The correct answer is c) NH3 < CH4 < PH3.In this case, NH3, CH4, and PH3 are all nonpolar molecules. However, NH3 and PH3 are polar molecules due to the presence of lone pairs on the nitrogen and phosphorus atoms, respectively.
The boiling point is a measure of the intermolecular forces between molecules. Polar molecules have dipole-dipole interactions, which are stronger than the London dispersion forces in nonpolar molecules like CH4. NH3 has the highest boiling point because it has the strongest dipole-dipole interactions due to its greater polarity compared to PH3. PH3 has the lowest boiling point because it has the weakest dipole-dipole interactions. Therefore, the correct order of increasing boiling point is NH3 < CH4 < PH3.
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a solution was prepared by adding 9.27 g of phosphoric acid to water had a volume of 92.80 ml. calculate the molarity of this solution.
The molarity of the solution when 9.27 g of phosphoric acid is added to water which had a volume of 92.80 ml is 1.02 M.
The molarity of the solution containing 9.27 g of phosphoric acid in 92.80 ml of water can be calculated as follows
Mass of phosphoric acid (H3PO4) = 9.27 g
Volume of solution = 92.80 mL
Convert volume of the solution to litres = 92.80 mL / 1000 = 0.0928 L
The molar mass of H3PO4 is:
Molar mass of H = 1.0079 g/mol
Molar mass of P = 30.9738 g/mol
Molar mass of O = 15.9994 g/mol
So, the molecular mass of H3PO4 = 3 × 1.0079 + 1 × 30.9738 + 4 × 15.9994= 98.0 g/mol
Now, Molarity (M) of the solution can be calculated by the formula:
M = mass of solute ÷ molar mass of solute × volume of solution in litres
Putting the values of mass, molar mass and volume of the solution in the above formula, we get:
M = (9.27 g ÷ 98.0 g/mol) ÷ 0.0928 L= 1.02 M
The molarity of the solution is 1.02 M.
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which way will the molecules move to establish equilibrium using passive transport?
Molecules will move from an area of higher concentration to an area of lower concentration in order to establish equilibrium through passive transport. This is due to diffusion, which is the process in which molecules spread out from areas of high concentration to areas of low concentration.
The way molecules move to establish equilibrium using passive transport is from high concentration to low concentration. Passive transport is the movement of molecules across the cell membrane without requiring the expenditure of energy.Passive transport includes diffusion, osmosis, and facilitated diffusion. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.
Osmosis is the diffusion of water molecules across a selectively permeable membrane. Facilitated diffusion is the movement of molecules across the cell membrane with the aid of carrier proteins or channel proteins.Passive transport ensures that the molecules are transported in the correct direction for equilibrium to be reached. Equilibrium is reached when there is no net movement of molecules across the cell membrane.
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Which factor does not affect the rate of dissolving a solid in a liquid?
A) Temperature.
B) Surface area of the solvent.
C) Surface area of the solute.
D) Agitation.
Option B, the surface area of the solvent, does not affect the rate of dissolving a solid in a liquid. The rate of dissolving a solid in a liquid is affected by several factors, including temperature, the surface area of the solute, and agitation.
Increasing the temperature of the solvent typically increases the rate of dissolving because it increases the kinetic energy of the solvent molecules, allowing them to interact more effectively with the solute. Increasing the surface area of the solute by breaking it into smaller pieces also increases the rate of dissolving because it provides more surface area for the solvent to interact with. Agitation, such as stirring or shaking, increases the rate of dissolving by keeping fresh solvent in contact with the solute.
However, the surface area of the solvent itself does not affect the rate of dissolving a solid in a liquid because it is the solute that is dissolving into the solvent, not the other way around. Therefore, the surface area of the solvent is not a factor that affects the rate of dissolving.
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What is the equilibrium expression for the following reaction? 2Na2O (s) ⇌ 4Na (l) + O2 (g) K = [Na]4[O2] K = [Na2O]2 / ([Na]4[O2]) K = [O2] K = ([Na]4[O2]) / [Na2O]2 K = [Na]4 / [Na2O]2
The equilibrium expression for the reaction 2Na₂O (s) ⇌ 4Na (l) + O₂ (g) is K = [Na]⁴[O₂].
The equilibrium expression expresses the ratio of the concentrations of the products to the concentrations of the reactants at equilibrium. In this case, the balanced chemical equation for the reaction is 2Na₂O (s) ⇌ 4Na (l) + O₂ (g).
The equilibrium constant (K) is defined as the product of the concentrations of the products, each raised to the power of its stoichiometric coefficient, divided by the product of the concentrations of the reactants, each raised to the power of its stoichiometric coefficient. Based on the balanced equation, the equilibrium expression can be written as K = [Na]⁴[O₂].
It is important to note that the concentrations used in the equilibrium expression are always in the units of molarity (mol/L). Also, the equilibrium constant is temperature-dependent, meaning that it can change with changes in temperature, but remains constant at a particular temperature.
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What color will a Bunsen burner flame change when a solution containing Sr2+ is added to it? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.a Red b Orange с Yellow d Green
When a solution containing strontium ions ([tex]Sr^{2+}[/tex]) is added to the Bunsen burner flame, it changes the color to red. Therefore, the answer is option A, red.
How does the color of a solution containing ions change in Bunsen flame?A Bunsen burner is a laboratory equipment that produces a single open gas flame, which is used for heating, sterilization, and combustion reactions. A Bunsen burner produces a clean blue flame when it is set to the right mixture of air and gas.
The color of a Bunsen burner flame is determined by the temperature of the flame and the chemicals being burned. The addition of chemicals to a Bunsen burner flame can cause it to change color.
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propose a structure for a molecule with the molecular formula C9H12 and corresponds to the following spectroscopic data
1H NMR d 6.78 (s, 1H), 2.26 (s, 3H); 13C NMR d 137.7 (no peak in DEPT-135 or DEPT-90), 127.0 (up peaks in both DEPT-135 and DEPT-90), 21.2 (up peak in DEPT-135, no peak in DEPT-90)
A proposed structure for the molecule with the molecular formula [tex]C_{9}H_{12}[/tex] , given the spectroscopic data, is 1-methyl-3-propylbenzene.
How to propose a structure for a molecule with given molecular formula and its NMR data?To propose a structure for a molecule with the molecular formula [tex]C_{9}H_{12}[/tex] and corresponding to the given spectroscopic data, we can follow these steps:
1. Analyze the 1H NMR data:
- d 6.78 (s, 1H) indicates a single hydrogen on an aromatic or unsaturated carbon.
- d 2.26 (s, 3H) suggests a methyl group (-CH3).
2. Analyze the 13C NMR data:
- d 137.7 (no peak in DEPT-135 or DEPT-90) corresponds to a quaternary carbon (no hydrogens attached).
- d 127.0 (up peaks in both DEPT-135 and DEPT-90) indicates a carbon with one hydrogen attached.
- d 21.2 (up peak in DEPT-135, no peak in DEPT-90) signifies a methyl carbon.
3. Combine the information:
- From the 1H NMR, we have one aromatic/unsaturated hydrogen and one methyl group.
- From the 13C NMR, we have one quaternary carbon, one carbon with a single hydrogen, and one methyl carbon.
4. Propose a structure:
- The molecule has nine carbons, so it could be an aromatic compound with a six-carbon ring (benzene-like) and three additional carbons.
- The quaternary carbon could be part of the aromatic ring, and the carbon with a single hydrogen could be connected to the ring and the methyl group.
- Based on this information, a possible structure is 1-methyl-3-propylbenzene.
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discuss why the density of the two branched materials (hdpe and ldpe) differed, despite having the same chemical composition. how is the density of a material influenced by its ability to pack? using the internet, determine how the material properties of the two materials differ as a function of density; refer to such properties as strength, flexibility, and rigidness.
The density of materials is influenced by the arrangement of their molecules and how well they can pack together. HDPE and LDPE have the same chemical composition, but their densities differ due to differences in their molecular structure.
HDPE has a more linear structure with fewer branches, while LDPE has a more branched structure with more branches. This branching reduces the ability of LDPE molecules to pack together as tightly as HDPE molecules, leading to a lower density for LDPE.
The density of a material can also influence its properties. HDPE, with its higher density, is generally stronger and more rigid than LDPE. It is also less flexible than LDPE, which can bend and deform more easily due to the branching in its molecular structure. LDPE, on the other hand, has better impact resistance than HDPE, meaning it can absorb more energy before breaking.
In addition, HDPE is more resistant to chemicals and has better temperature resistance than LDPE. However, LDPE is more resistant to stress cracking and is more easily processed due to its lower melting point.
In summary, the density of a material is influenced by its molecular structure and packing ability, which can in turn affect its strength, flexibility, and other material properties. HDPE and LDPE, despite having the same chemical composition, have different densities and properties due to differences in their molecular structures.
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What is the main reason plants grow fruit?
Answer: Fruits contain seeds and develop from the ovaries of flowering plants. The first step in making fruits is pollination. Fruit trees and plants produce flowers. Then, bees, bats, birds, and even the wind spread pollen from one flower to another.
Answer:
Fruits contain seeds and develop from the ovaries of flowering plants. The first step in making fruits is pollination. Fruit trees and plants produce flowers. Then, bees, bats, birds, and even the wind spread pollen from one flower to another.
Explanation:
a buffer that contains 0.18 m of a base, b and 0.48 m of its conjugate acid bh , has a ph of 8.91. what is the ph after 0.028 mol of ba(oh)2 are added to 0.62 l of the solution?
The pH of the solution after 0.028 moles of Ba(OH)2 are added to 0.62L of the buffer solution containing 0.18M of base B and 0.48M of its conjugate acid BH is 8.89. To calculate the pH, you need to use the Henderson-Hasselbalch equation: pH = pKa + log ([B]/[BH]).
First, calculate the total moles of B and BH by adding 0.028 moles of Ba(OH)2 to 0.62L of the original buffer solution, then use the equation to calculate the pH. Here are the steps:
1. Calculate the total moles of B and BH after 0.028 moles of Ba(OH)2 are added.
Total moles of B = 0.18 + (0.028 / 2) = 0.194
Total moles of BH = 0.48 + (0.028 / 2) = 0.508
2. Calculate the pH using the Henderson-Hasselbalch equation.
pH = pKa + log ([B]/[BH])
pH = 8.91 + log (0.194/0.508)
pH = 8.89
Therefore, the pH of the solution after 0.028 moles of Ba(OH)
are added to 0.62L of the buffer solution is 8.89.
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if the bond that was broken was a relatively strong bond, would you expect the acid to be a stronger or weaker acid?
How many pKa values are there for a monoprotic acid ?
a. 4
b. 2
c. 1
d. 3
Answer:
Only one, so option c
Explanation:
Because monoprotic as it says, had only one proton to lose giving it only one pka for example Hydrochloric Acid (H-Cl). unlike a diprotic acid which would have two pkas like carbonic acid for example (H2CO3).
how many atoms are there in 58.7 g of nickel? group of answer choices 1 none of these 6.02 x 1023 28 1.204 x 1024
There are approximately 6.02 x 10²³ atoms in 58.7 g of nickel.
The molar mass of nickel (Ni) is 58.69 g/mol.
Using the formula:
number of moles = mass / molar mass
we can calculate the number of moles of nickel in 58.7 g:
number of moles = 58.7 g / 58.69 g/mol
number of moles = 1.0006 mol
Since one mole of any substance contains Avogadro's number of atoms (6.022 x 10²³), we can calculate the number of atoms of nickel in 1.0006 mol:
number of atoms = 1.0006 mol x 6.022 x 10²³ atoms/mol
number of atoms = 6.025 x 10²³ atoms
Therefore, there are approximately 6.025 x 10²³ atoms in 58.7 g of nickel
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Proton 1 moves with a speed v from the east coast to the west coast in the continental United States; proton 2 moves with the same speed from the southern United States toward Canada. Is the magnitude of the magnetic force experienced by proton 2 greater than, less than, or equal to the force experienced by proton 1? a. greater than the force experienced by proton 1 b. less than the force experienced by proton 1 c. equal to the force experienced by proton 1 Choose the best explanation from among the following: a. Proton 1 experiences the greater force because it moves at right angles to the magnetic field. b. The protons experience the same force because the magnetic field is the same and their speeds are the same. c. Proton 2 experiences the greater force becaue it moves in the same direction as the magnetic field
As an AI, I will provide the best answer based on the given question and I will not exceed 200 words.The magnitude of the magnetic force experienced by proton 2 is less than the force experienced by proton 1. The explanation for this statement is option (a) Proton 1 experiences the greater force because it moves at right angles to the magnetic field.What is the Magnetic Force?
The force that is exerted on a charged particle that is moving in a magnetic field is referred to as the magnetic force. When a particle moves in a magnetic field, it experiences a force. This is due to the interaction between the magnetic field and the moving charge. In order to understand the effect of a magnetic field on a moving charged particle, it is necessary to first understand the nature of a magnetic field. Magnetic fields are caused by the motion of charged particles. These fields are invisible, but they can be detected with the help of a magnet.The magnetic force on a charge particle is given by:F=qvBsinθwhere,F is the magnetic force q is the charge of the particlev is the velocity of the particleB is the strength of the magnetic fieldθ is the angle between the velocity of the particle and the direction of the magnetic field.When the particle is moving perpendicular to the magnetic field, the angle between the velocity of the particle and the direction of the magnetic field is 90 degrees. The force acting on the particle is then maximum. If the particle moves parallel to the magnetic field, the angle between the velocity of the particle and the direction of the magnetic field is 0 degrees. The force acting on the particle is then zero.The magnitude of the magnetic force experienced by proton 2 is less than the force experienced by proton 1. This is because proton 2 moves in the same direction as the magnetic field, whereas proton 1 moves at right angles to the magnetic field. When a charged particle moves in the same direction as the magnetic field, it experiences very little magnetic force. Therefore, the magnitude of the magnetic force experienced by proton 2 is less than the force experienced by proton 1.
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Of the following scientists, identify who was not connected with the development of the atomic theory? 1) Neils Bohr 2) Linas Pauling 3) J. J. Thomson 4) Rutherford 5) Chadwick
Linus pauling
1. In 1913, Niels Bohr proposed a theory for the hydrogen atom, based on quantum theory that some physical quantities only take discrete values. Electrons move around a nucleus, but only in prescribed orbits, and If electrons jump to a lower-energy orbit, the difference is sent out as radiation
3. J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged "soup."
4. Ernest Rutherford found that the atom is mostly empty space, with nearly all of its mass concentrated in a tiny central nucleus. The nucleus is positively charged and surrounded at a great distance by the negatively charged electron
5. In 1932, Chadwick made a fundamental discovery in the domain of nuclear science: he proved the existence of neutrons – elementary particles devoid of any electrical charge.
Linus pauling was the only scientist not related to the development of the atomic theory.
During the 1930s Linus Pauling was among the pioneers who used quantum mechanics to understand and describe chemical bonding–that is, the way atoms join together to form molecules.
in order to prepare a 0.30 m solution of food dye, how many ml of a 2.67 m stock solution should you add to a 50 ml volumetric flask before filling the flask to the calibration mark?
We need to add 5.61 ml of a 2.67 M stock solution dye to a 50 ml volumetric flask before filling the flask to the calibration mark.
This can be found using the formula of concentration and volume for dilution of solutions which is C1V1=C2V2.
Steps for finding the ml of a 2.67 M stock solution that should be added to a 50 ml volumetric flask before filling the flask to the calibration mark:
C1= is the initial concentration of the solution
V1 = is the initial volume of the solution
C2 = is the final concentration of the solution
V2 = is the final volume of the solution
Now, let's substitute the given values into the formula
Stock concentration : 2.67 M = C1
Final concentration : 0.30 M = C2
Final Volume : 50 ml = V2
Let V1 is the stock solution required
Therefore, 2.67 M * V1 = 0.30 M * 50 ml
2.67 M * V1 = 15 ml
V1 = 5.61 ml
Therefore, we need to add 5.61 ml of a 2.67 M stock solution to a 50 ml volumetric flask before filling the flask to the calibration mark to prepare a 0.30 M solution of food dye.
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Which of the following is the net ionic equation for the reaction that occurs between aqueous solutions of potassium phosphate and aluminum chloride?
a. 2Al3+(aq) + 3PO42–(aq) → Al2(PO4)3(s)
b. Al3+(aq) + PO43–(aq) → AlPO4(s)
c. 3Al(aq) + 2PO4(aq) → Al3(PO4)2(s)
d. 2Al(aq) + 3PO4(aq) → Al2(PO4)3(s
e. Al(aq) + PO4(aq) → AlPO4(s)
Net ionic equation for the reaction that occurs between aqueous solutions of potassium phosphate and aluminum chloride is Al3+(aq.) + PO43–(aq.) → AlPO4(s). So, option (b) is correct.
The net ionic equation is defined as the chemical equation that shows only those elements, compounds, and ions that are directly involved in the chemical reaction. Aqueous potassium phosphate reacts with aqueous aluminum chloride to form aqueous potassium chloride and solid aluminum phosphate. The balanced equation of the reaction between aqueous aluminum chloride and potassium phosphate to form aqueous potassium chloride and solid aluminum phosphate is,
K3PO4(aq.) + AlCl3(aq.) ---> 3 KCL (aq.) + AlPO4(s)
Net ionic equations must be balanced by both mass and charge that means we have to ensure that there are equal masses of each element on the product and reactant sides. Balancing the equation by charge means making sure that the overall charge is the same on both sides of the equation. Balancing the molecular equation properly the net ionic equation will end up being balanced by both mass and charge of the equation.
Al3+(aq.) + PO43–(aq.) → AlPO4(s)
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describe how the fuel cell obeys the law of conservation of mass
A fuel cell is an electrochemical device that converts chemical energy from a fuel (such as hydrogen) and an oxidizing agent (such as oxygen) into electrical energy, water, and heat.
What is Fuel?
Fuel is a material that is burned or processed to release energy in the form of heat or to produce work. Common examples of fuel include coal, natural gas, gasoline, diesel, and wood. The energy contained within the fuel is released through a chemical reaction, usually with oxygen, to produce heat, light, or other forms of energy. Fuel is used to power a wide range of machinery and devices, including vehicles, power plants, and heating systems.
The reactants (fuel and oxidizing agent) are supplied to the cell, where they undergo a chemical reaction in the presence of a catalyst, producing electricity and the byproduct water.
According to the law of conservation of mass, mass cannot be created or destroyed in a chemical reaction. In the case of a fuel cell, the mass of the reactants (fuel and oxidizing agent) is equal to the mass of the products (water) plus the mass of the electricity produced
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which of the following would be the least soluble in water? question 5 options: a) ch3ch2ch2nh2 b) ch3ch2ch2ch2nh2 c) ch3ch2ch2ch2ch2ch2nh2 d) ch3nh2 e) ch3ch2nh2
The compound least soluble in water would be Option C, CH3CH2CH2CH2CH2CH2NH2. When an ionic compound is added to water, it splits into cations and anions, which are surrounded by water molecules. When a solute dissolves in a solvent, the solvent's molecules surround the solute's molecules.
The solubility of compounds varies widely depending on their chemical structure. A compound with polar bonds is typically more soluble in polar solvents like water, while a compound with nonpolar bonds is typically more soluble in nonpolar solvents like oil.
Here are the options and their solubility characteristics:
Option A: CH3CH2CH2NH2. This is a primary amine. Primary amines have polar covalent bonds but are less polar than alcohols. They can hydrogen-bond with water, making them moderately soluble in water.Option B: CH3CH2CH2CH2NH2. This is a primary amine with one more carbon than Option A. It is a larger molecule and has a longer nonpolar chain. It is less polar than Option A and less likely to dissolve in water.Option C: CH3CH2CH2CH2CH2CH2NH2. This is a primary amine with six carbons. It is even larger than Option B and less polar. As a result, it is less likely to dissolve in water.Option D: CH3NH2. This is a primary amine with only one carbon. It is polar and has a strong dipole moment, allowing it to dissolve easily in water.Option E: CH3CH2NH2. This is also a primary amine. It has more polar bonds than Option B but fewer than Option A. It is moderately soluble in water.Learn more about solubility: https://brainly.com/question/21717923
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A 1435 mL sample of drinking water was found to contain 16. 0 mg of lead. Calculate the concentration of lead in milligrams per liter
11.15 mg/L of lead is present in the sample of potable water.
To calculate the concentration of lead in milligrams per liter (mg/L), we need to convert the volume of the sample from milliliters (mL) to liters (L).
1 L = 1000 mL
Therefore, the volume of the sample in liters is:
1435 mL ÷ 1000 mL/L = 1.435 L
Next, we can use the formula:
Concentration = Amount of solute ÷ Volume of solution
where the amount of solute is given in milligrams (mg) and the volume of solution is given in liters (L).
Substituting the values we have:
Concentration = 16.0 mg ÷ 1.435 L
Concentration = 11.15 mg/L
Therefore, the concentration of lead in the drinking water sample is 11.15 mg/L.
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To calculate the concentration of lead in milligrams per liter, we first need to convert the volume of the sample to liters and the mass of lead to milligrams.
Lead is a chemical element with the symbol Pb (from the Latin word plumbum) and atomic number 82. It is a soft, dense, bluish-grey metal that is toxic and can cause serious health problems, particularly in children and pregnant women.
Given:
Volume of sample (V) = 1435 mL = 1.435 L
Mass of lead (m) = 16.0 mg
We can use the formula for concentration:
concentration = mass of solute / volume of solution
Substituting the values:
concentration = 16.0 mg / 1.435 L
Simplifying:
concentration = 11.14 mg/L
Therefore, the concentration of lead in the drinking water sample is 11.14 milligrams per liter.
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a gas occupys 12.3 liters at a pressure of 40.0 mmhg. what is the volume when the pressure is increased to 60 mmhg
The volume of the gas drops from 12.3 L to 8.20 L as the pressure rises from 40.0 mmHg to 60.0 mmHg.
To solve this problem, we can use Boyle's law, which states that the pressure and volume of a gas are inversely proportional when the temperature and the number of particles are constant. Mathematically, Boyle's law can be expressed as P₁V₁ = P₂V₂, where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume.
Using this formula, we can calculate the final volume of the gas when the pressure is increased from 40.0 mmHg to 60.0 mmHg:
P₁V₁ = P₂V₂
(40.0 mmHg)(12.3 L) = (60.0 mmHg)(V₂)
Simplifying the equation, we get:
V₂ = (40.0 mmHg)(12.3 L) / (60.0 mmHg) = 8.20 L
Therefore, when the pressure is increased from 40.0 mmHg to 60.0 mmHg, the volume of the gas decreases from 12.3 L to 8.20 L, assuming the temperature and the number of particles remain constant.
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For this question, choose THREE answers. Which question should be asked prior to (before) writing the name for H2SO 4 (aq)?
If the H2SO4 formula is understood, the name can be written according to the naming guidelines for acids.
What is the process for making H2SO4?Industrially, sulfuric acid is created when water reacts with sulphur trioxide (see sulphur oxide), which is created chemically by combining oxygen and sulphur dioxide, either through the contact process or the chamber process.
What function does H2SO4 serve in this preparation?In the process of converting ethanol to ethane, H2SO4 serves as a dehydrating agent. It aids in removing water molecule (more particularly , the -OH group from one carbon and -H from the other carbon) in the following reaction: CH3CH2OH.
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The questions that should be asked before writing the name for H₂SO₄ are options 2, 3, and 5.
These questions are relevant because they provide important clues about the compound's naming conventions and help determine the correct name for H₂SO₄. The suffix "-ic" is commonly used for naming the anions of many acids. The suffixes "-ate" and "-ite" are commonly used for naming the anions of many compounds, including acids.
Hydrogen can act as a cation in some compounds, including acids. Recognizing hydrogen's role as a cation helps determine the appropriate naming conventions for the compound.
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Your question is incomplete, most probably the full question is this:
Which question should be asked prior to writing the name for H₂SO₄? Select all that apply.
Does the formula contain a hydrocarbon?Does the anion end in -ic?Does the anion ends in -ate or ite?Does the formula have a polyatomic ion?Does the formula have hydrogen as a cation?What is the formula mass for copper (II) sulfate pentahydrate?
Answer:249.68 g/mol
Explanation:
How many moles of AgCl are produced from .562 moles of NaCl?
Answer: 68.5826%
Explanation:
2. your chemistry lab partner is interested in studying how industrial chemicals can pollute the environment. what field of specialization would you recommend to your lab partner and which courses should they take in order to study it? explain your answer. (4 points)
If my lab partner is interested in studying how industrial chemicals pollute the environment, I would recommend him to take specialization in the field of environmental chemistry.
Environmental chemistry is a branch of chemistry of utmost importance as it deals with the various impacts that are caused upon the environment by chemicals released from industries and day to day activities.
I would recommend my lab partner to take courses of analytical chemistry, physical, inorganic and organic chemistry as well in order to investigate in depths of environmental chemistry. All these fields are needed to be studied in order to study about the occurrence of environmental pollution by industrial chemicals.
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how to remove an amino group from an amino acid to form pyruvate or acetyl coa?
To remove an amino group (-NH₂) from an amino acid and convert it to pyruvate or acetyl CoA, a process called deamination.
Deamination involves the removal of the amino group from the amino acid, resulting in the formation of ammonia (NH3) and a keto acid. Pyruvate is a keto acid, while acetyl CoA is derived from a keto acid through a further series of reactions.
There are two main pathways by which deamination can occur in the body: Transamination: In this pathway, the amino group is transferred from the amino acid to an alpha-keto acid, resulting in the formation of the new amino acid and the new keto acid. The enzyme responsible for this reaction is called transaminase or aminotransferase. Pyridoxal phosphate (PLP), a derivative of vitamin B6, is a cofactor required for this reaction.
Oxidative deamination: In this pathway, the amino group is directly removed from the amino acid and transferred to a molecule of oxygen, resulting in the formation of ammonia and a keto acid. The enzyme responsible for this reaction is called deaminase, and it requires the presence of molecular oxygen.
Once the amino group has been removed from the amino acid, the resulting keto acid can be further metabolized to form pyruvate or acetyl CoA through a series of additional reactions in various metabolic pathways, depending on the specific amino acid and the conditions of the reaction.
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correct the statement: sodium reacts with chlorine to form sodium chloride
Answer:
It is correct.
Explanation:
The statement “sodium reacts with chlorine to form sodium chloride” is correct.
Sodium and chlorine react to form sodium chloride, which is a type of salt. When sodium and chlorine combine, they form an ionic bond.
What is an ionic bond?An ionic bond is a type of chemical bond that occurs when one atom donates an electron to another atom.
In this case, sodium donates an electron to chlorine, which results in the formation of sodium chloride.
a polystyrene molecule has a molar mass of 18,000 g/mol. calculate the number of monomer units (the degree of polymerization) for this molecule.
The polystyrene molecule with a molecular mass of 18,000 g/mol has approximately 173 monomer units.
A polystyrene molecule has a molar mass of 18,000 g/mol.
To calculate the number of monomer units (the degree of polymerization) for this molecule, we need to use the formula for calculating the degree of polymerization:
Degree of polymerization = (Molar mass of polymer) / (Molar mass of monomer)
For polystyrene, the monomer is styrene, which has a molar mass of 104 g/mol.
Using the above formula, we get:
Degree of polymerization = 18,000 g/mol ÷ 104 g/mol= 173.08
Therefore, the number of monomer units (the degree of polymerization) for this polystyrene molecule is approximately 173.
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what nacl nacl concentration results when 259 ml 259 ml of a 0.860 m 0.860 m nacl nacl solution is mixed with 552 ml 552 ml of a 0.350 m 0.350 m nacl nacl solution?
When 259 ml of a 0.860 M NaCl solution is mixed with 552 ml of a 0.350 M NaCl solution, the concentration of NaCl will be 0.496 M.
What is NaCl?NaCl is the chemical formula for sodium chloride, which is a salt consisting of sodium ions and chloride ions. It is commonly referred to as table salt and is commonly used as a seasoning in cooking and a preservative in food processing.
What is concentration?Concentration refers to the amount of solute that is dissolved in a given amount of solvent or solution. It is generally measured in molarity (M), which is defined as the number of moles of solute per liter of solution. The equation for calculating molarity is as follows:
Molarity (M) = moles of solute / liters of solutionSteps to find out the NaCl concentration:
Given that 259 ml of a 0.860 M NaCl solution is mixed with 552 ml of a 0.350 M NaCl solution.
First, find the moles of NaCl in the first solution (259 ml of 0.860 M NaCl).
0.860 M means there are 0.860 moles of NaCl for every liter of solution.
In 259 ml (0.259 L) of this solution, there will be:
moles of NaCl = 0.860 M × 0.259 L = 0.22294 mol NaCl
Next, find the moles of NaCl in the second solution (552 ml of 0.350 M NaCl).
0.350 M means there are 0.350 moles of NaCl for every liter of solution.
In 552 ml (0.552 L) of this solution, there will be:
moles of NaCl = 0.350 M × 0.552 L = 0.1932 mol NaCl
Total moles of NaCl in the final solution = 0.22294 mol + 0.1932 mol = 0.41614 mol NaCl
Finally, calculate the molarity of the final solution (which is the concentration of NaCl):
Molarity = moles of NaCl / liters of solutionThe total volume of the final solution is 259 ml + 552 ml = 811 ml or 0.811 L.
Molarity = 0.41614 mol / 0.811 L = 0.513 M NaCl
Therefore, when 259 ml of a 0.860 M NaCl solution is mixed with 552 ml of a 0.350 M NaCl solution, the concentration of NaCl will be 0.496 M.
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Assuming each solution to be 0.10 M , rank the following aqueous solutions in order of decreasing pH. Rank the solutions from the highest to lowest pH. To rank items as equivalent, overlap them.
N2H4, Ba(OH)2, NaOH, HCI, HOCI
Highest PH to Lowest pH
The order of decreasing pH from highest to lowest is Ba(OH)2 > NaOH > N2H4 > HOCI > HCI.
pH measures how acidic or basic a solution is, based on the concentration of hydrogen ions (H+) in the solution. A low pH means a high concentration of H+ ions, making the solution more acidic. A high pH means a low concentration of H+ ions, making the solution more basic or alkaline.
NaOH is a strong base that completely dissociates in water, producing a high concentration of OH- ions and a pH of 14. Ba(OH)2 is also a strong base and produces twice as many OH- ions as NaOH, so it has an even higher pH than NaOH. HOCI is a weak acid partially dissociating in water, producing H+ and ClO- ions. The equilibrium between the two ions determines the pH, which is around 4.5 for a 0.10 M solution.
HCI is a strong acid dissociating completely in water, producing H+ and Cl- ions. Since the concentration of H+ ions is very high, the pH is very low (around 1). N2H4 is a weak base partially dissociating in water, producing NH3 and NH2- ions. The equilibrium between the two ions determines the pH, which is around 8.4 for a 0.10 M solution.
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how many moles of salt are produced, when 5.32 moles of sodium carbonate react with an excess amount of calcium chloride?
Answer:
To answer this question, we first need to write the balanced chemical equation for the reaction between sodium carbonate and calcium chloride:
Na2CO3 + CaCl2 → 2NaCl + CaCO3
From the equation, we see that 1 mole of sodium carbonate reacts with 1 mole of calcium chloride to produce 1 mole of calcium carbonate and 2 moles of sodium chloride.
Therefore, since we have an excess amount of calcium chloride, we can assume that all 5.32 moles of sodium carbonate react completely to produce 10.64 moles of sodium chloride.
So the answer is: 10.64 moles of salt (sodium chloride) are produced.
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