a. The final concentration of KOH is 0.500 M.
b. The concentration of K+ and OH- ions is 0.500 M.
Step by step explanationTo solve this problem, we need to use the equation:
M1V1 = M2V2
where M1 is the initial concentration of the solution, V1 is the initial volume of the solution, M2 is the final concentration of the solution, and V2 is the final volume of the solution.
a) To find the concentration of each solute, we need to first determine the final volume of the solution:
Final volume = 50.0 mL + 25.0 mL = 75.0 mL
Now we can use the equation above to find the final concentration of KOH:
M1V1 = M2V2
(0.750 M)(50.0 mL) = M2(75.0 mL)
M2 = (0.750 M)(50.0 mL) / (75.0 mL)
M2 = 0.500 M
Therefore, the final concentration of KOH is 0.500 M.
b) To find the concentration of each ion, we need to use the final concentration of KOH and the fact that KOH dissociates into K+ and OH- ions in solution. The concentration of K+ and OH- ions will be the same as the final concentration of KOH:
[ K+ ] = 0.500 M
[ OH- ] = 0.500 M
Therefore, the concentration of K+ and OH- ions is 0.500 M.
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Suppose 7.64g of iron(II) iodide is dissolved in 250. mL of a 0.20M aqueous solution of silver nitrate.
Calculate the final molarity of iodide anion in the solution. You can assume the volume of the solution doesn't change when the iron(II) iodide is dissolved in it.
Be sure your answer has the correct number of significant digits.
Iodide anion's final molarity in the solution is 0.13388 M.
We can utilise the molarity formula, which is [tex]molarity =\frac{ moles of solute}{liters of solution}[/tex], to solve this problem.
First, we need to calculate the moles of iron(II) iodide.
Use the formula to accomplish this. [tex]moles =\frac{ mass}{molar mass}[/tex]. The molar mass of iron(II) iodide is 227.88 g/mol,
so the moles of iron(II) iodide is [tex]\frac{7.64 g }{227.88 g/mol }= 0.03347 moles[/tex]
Now, we can calculate the molarity of iodide anion.[tex]Molarity of iodide anion = \frac{moles of iodide anion}{liters of solution}[/tex].Since each mole of iron(II) iodide contains 1 mole of iodide anion, the moles of iodide anion is 0.03347 moles.
The liters of solution is 0.250 liters, so the molarity of iodide anion is [tex]\frac{0.03347 moles}{0.250 liters }= 0.13388 M.[/tex]
Therefore, the final molarity of iodide anion in the solution is 0.13388 M.
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Given the complex [Fe(en)2(NO2)2]NO2
1) What is the oxidation state of the metal?
2) What is the coordination number for the complex ion?
3) What is the shape of the complex ion?
4) Are the ligands strong or weak?
5) Is the compound high or low spin?
6) Is the Epairing < or > delta?
7) Using Crystal Field splitting to show many unpaired electrons are present in the compound?
8) Draw all geometric isomers if they exist.
9) Draw all optical isomers if they exist.
The oxidation state of the iron ion in the complex [Fe(en)2(NO2)2]NO2 is +1.
What is Oxidation State?
Oxidation state, also known as oxidation number, is a number assigned to an atom in a chemical compound that represents the number of electrons that atom has gained or lost relative to its neutral state.
In other words, oxidation state is a measure of the degree of oxidation of an atom in a molecule or ion. An atom is considered to be oxidized if it loses electrons, and reduced if it gains electrons.
In the given complex [Fe(en)2(NO2)2]NO2, the metal is iron (Fe). To determine the oxidation state of the iron ion in the complex, we can use the oxidation states of the other atoms and the charge of the complex.
The en ligand is ethylenediamine (C2H8N2), which has a neutral charge. The NO2 ligand is nitrite, which has a -1 charge. The overall charge of the complex is -1 due to the NO2^- counterion.
Let x be the oxidation state of the iron ion.
From the ethylenediamine ligands, we have a total charge of +4 (2 x +2).
From the nitrite ligands, we have a total charge of -4 (2 x -1 x 2).
From the complex charge, we have a total charge of -1.
Setting the sum of these charges equal to the charge of the iron ion (x) gives us:
+4 - 4 - 1 = x
Simplifying the equation gives us:
-x = -1
Solving for x gives us:
x = +1
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The (C4H1 0)3N represents a _______ amine.
Answer:
Tertiary amine
Explanation:
An amine in which the nitrogen atom is directly bonded to three carbons of any hybridization which cannot be carbonyl group carbons.
The pOH of a solution is 8.3. Which of the following is true about the solution?
a
It is acidic and has a pH of 5.7.
b
It is acidic and has a pH of 3.8.
c
It is basic and has a pH of 5.7.
d
It is basic and has a pH of 3.8.
An answer has a pOH of 8.3. True about the solution is that it is basic and has a pH of 5.7.
What does "solution" mean in its simplest form?When one or more solutes are dissolved in a solvent, the result is a homogenous mixture known as a solution. a solvent is a substance that helps a solute dissolve so that a homogenous mixture results. When a substance dissolves in a solvent, it forms a homogenous mixture, which is known as a solute.
Why is a solution important in chemistry?A continuous variation in the relative proportions of a number of substances that is homogeneous and can be changed up to the solubility limit. Although the word "solution" is typically used to describe the liquids state of a substance, it is also possible for gases and solids to form solutions.
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The correct answer is that it is acidic and has a pH of 5.7.
I need the answer for number 2
Answer:
+ Triple covalent bond (CB) > double CB > single CB in terms of bond strength and energy needed to break the bonds
+ Triple bonds are the most reactive, double bonds are reactive but single bonds are unreactive
+ Single bond > double bond > triple bond in bond length
+ in single bond, 2 electrons are shared
+ in double bond, 4 electrons are shared
+ in triple bond, 6 electrons are shared
At standard temperature and pressure, a given sample of water vapor occupies a volume of 2.80 L. What is the weight of the water?
Explanation:
The weight of water vapor can be determined by using the ideal gas law, which relates the pressure, volume, and temperature of a gas to the number of moles of gas present. We can then use the molar mass of water to calculate the weight of the water vapor.
At standard temperature and pressure (STP), the pressure is 1 atm and the temperature is 273.15 K. The ideal gas law is expressed as:
PV = nRT
where P is the pressure in atmospheres, V is the volume in liters, n is the number of moles, R is the gas constant (0.08206 L·atm/mol·K), and T is the temperature in Kelvin.
Rearranging this equation to solve for n, we have:
n = PV/RT
Substituting the values we know, we get:
n = (1 atm)(2.80 L) / (0.08206 L·atm/mol·K)(273.15 K)
n = 0.1082 mol
The molar mass of water is 18.01528 g/mol, so the weight of the water vapor is:
weight = n x molar mass
weight = 0.1082 mol x 18.01528 g/mol
weight = 1.952 g
Therefore, the weight of the water vapor is 1.952 g.
About how many elements are known to form bonds with atoms
Answer:
The number refers to the number of bonds each of the element makes: Hydrogen makes 1 bond, Oxygen makes 2 bonds, Nitrogen makes 3 bonds and Carbon makes 4 bonds. These four elements are widely used when it comes to drawing Lewis structures at introductory chemistry level.
Explanation:
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An object can be moving at a constant speed and still accelerating if it is changing 6.______
If an object is changing directions, it can be moving at a constant speed while yet accelerating.
This is due to the fact that acceleration is a vector number that takes into consideration the speed of an object both in magnitude and direction.
StepsAn object's acceleration vector also changes as it changes direction, which causes the object's velocity vector to change.
As a result, even though the item is moving at a constant speed, the change in its velocity vector is causing it to accelerate.
Centripetal acceleration is the term for the type of acceleration that keeps objects moving in a circular motion.
Even though an object's speed is constant while it moves in a circular pattern, it is still accelerating.
This is due to the fact that acceleration is a vector number that takes into consideration the speed of an object both in magnitude and direction.
As an item follows a circular course, its acceleration vector also constantly changes direction along with its velocity vector.
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A solution prepared by dissolving 66.0 g of urea (NH2)2CO in 950 g of water
had a density of 1.018 g mL–1. Express the concentration of urea in
a- weight-percent; b- mole fraction; c- molarity; d- molality.
The energy diagram shows the changes in energy during a chemical reaction.
Which statement best describes the total energy change of the system?
Potential energy
Reaction progress
A. The reactants have lower potential energy, and energy is
absorbed.
B. The reactants have lower potential energy, and energy is released.
C. The reactants have higher potential energy, and energy is released.
• D. The reactants have higher potential energy, and energy is
absorbed.
Answer: D.
Explanation:
In an exothermic reaction, the reactants have higher potential energy than the products, and energy is released. In an endothermic reaction, the reactants have lower potential energy than the products, and energy is absorbed. In this case, the statement that best describes the total energy change of the system is D. The reactants have higher potential energy, and energy is absorbed.
I hope this helps. Let me know if you have any other questions!
Which of the chemicals in the equation below is acting as a base?
b. [tex]C_5N_4H_4O_3[/tex] is the chemical in the equation which acts as a base.
A base that can dissolve in water is referred to as being alkali. These chemicals produce salts when they interact chemically with acids. Red litmus can turn blue when bases are present. Depending on the specific way that the qualities of acidity and basicity are examined, the terms acid and base have been defined in a variety of ways.A base is defined as a compound which is capable of accepting a proton or a hydrogen ion in a chemical reaction.
Chemically, the equation is [tex]C_3N_2H_4+C_5N_4H_4O_3 \rightarrow C_3N_2H_5^+ +C_5N_4H_3O_3^-[/tex]
In this equation, [tex]C_5N_4H_4O_3[/tex] is the compound that is accepting a proton (or hydrogen ion) to form [tex]C_3N_2H_5^{+[/tex] and [tex]C_5N_4H_3O_3^-[/tex]. Therefore, [tex]C_5N_4H_4O_3[/tex] is the base in this equation.
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30/3/2023
7 Num 224/321094
CHM 106
irse
Assignment
What Do you understand by the term
florescence the forth
Alatrone
of
Carbon
2 Bxplain it's uses. as Mano tubules, Nano Structures,
Nano Chemist
Fluorescence is a phenomenon where a substance absorbs light at a specific wavelength and then emits light at a longer wavelength. This process occurs when an electron in a molecule or atom absorbs energy, becomes excited, and then returns to its ground state by releasing the absorbed energy as light.
Carbon is a versatile element that forms various allotropes such as graphite, diamond, and fullerenes. In the context of nanotechnology, carbon is used to create nanostructures like carbon nanotubes, graphene, and other related materials.
Carbon nanotubes (CNTs) are cylindrical nanostructures made up of carbon atoms, and they have extraordinary mechanical, electrical, and thermal properties. These properties make CNTs useful in various applications such as electronics, energy storage, and composite materials.
Graphene, another carbon nanostructure, is a single layer of carbon atoms arranged in a hexagonal lattice. It exhibits remarkable electronic, thermal, and mechanical properties. Graphene has potential applications in fields like electronics, sensors, and energy storage.
A nanochemist is a scientist who specializes in studying the synthesis, characterization, and applications of nanomaterials, including carbon-based nanostructures.
In summary, fluorescence is a light emission process that can be observed in certain substances, while carbon nanostructures like carbon nanotubes and graphene are materials with unique properties that have promising applications in nanotechnology.
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If a negatively charged object is brought near a neutrally charged sphere what will happen
Answer:
If a negatively charged object is brought near a neutral sphere, the electrons in the neutral sphere will move away from the negatively charged object, causing one side of the sphere to become slightly negative and the other side to become slightly positive.
Explanation:
This is because the negative charge repels the electrons in the neutral sphere, creating an imbalance of charges on the sphere.
Without checking their boiling points, how would you expect Cl2’s boiling point to compare to Br2's? Explain.
Based on their molecular properties, I would expect that the boiling point of Cl2 would be lower than that of Br2.
How does the boiling points compare?The boiling point of a substance is largely determined by the strength of the intermolecular forces between its molecules. In particular, substances with stronger intermolecular forces tend to have higher boiling points.
Both Cl2 and Br2 are halogens and exist as diatomic molecules. However, Br2 has more electrons than Cl2, and as a result, it has more electrons available for intermolecular interactions.
This means that Br2 molecules can form stronger London dispersion forces with each other than Cl2 molecules can. London dispersion forces are the weakest intermolecular force, but they still contribute to the overall strength of intermolecular attractions.
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if equal 20g of both So2 and O2 are reacted. which substance is alimiting reacted ? how many grams of are formed ?
Answer: The balanced chemical equation for the reaction between SO2 and O2 is:
2 SO2 + O2 → 2 SO3
According to the equation, 1 mole of O2 reacts with 2 moles of SO2 to form 2 moles of SO3.
To determine which substance is the limiting reactant, we need to calculate the amount of product that can be formed by each reactant and choose the reactant that produces the least amount of product.
First, we need to determine the number of moles of SO2 and O2 present:
Number of moles of SO2 = mass / molar mass = 20 g / 64.06 g/mol = 0.312 moles
Number of moles of O2 = mass / molar mass = 20 g / 32.00 g/mol = 0.625 moles
Now we can calculate the amount of product formed by each reactant:
Amount of SO3 formed from SO2 = 0.312 moles × (2 moles SO3 / 2 moles SO2) × (80.06 g/mol SO3) = 12.48 g SO3
Amount of SO3 formed from O2 = 0.625 moles × (2 moles SO3 / 1 mole O2) × (80.06 g/mol SO3) = 100.10 g SO3
From the calculations, we can see that the limiting reactant is SO2, as it produces the least amount of product (12.48 g of SO3). Therefore, 12.48 g of SO3 is formed when 20 g of both SO2 and O2 are reacted.
Explanation:
what is steam distillation ?
Answer:
Steam distillation is a specialized method of distillation used to extract essential oils, aromatic compounds, and other volatile substances from plants or other materials that are sensitive to high temperatures. This technique involves passing steam through the plant material, which vaporizes the volatile compounds, and then condensing the steam and the vaporized compounds into a liquid form.
The steam distillation process is typically carried out in a distillation apparatus, which consists of a boiling flask, a condenser, and a receiver. The plant material is placed in the boiling flask and steam is introduced into the flask from a separate boiler or steam generator. The steam then passes through the plant material, vaporizing the essential oils and other volatile compounds. The steam and the vaporized compounds then pass through the condenser, where they are cooled and condensed into a liquid form, which is collected in the receiver.
Steam distillation is particularly useful for extracting essential oils and aromatic compounds from plant materials that are too delicate to withstand the high temperatures required for traditional distillation techniques. It is commonly used in the production of essential oils for use in perfumes, aromatherapy, and other applications. Additionally, steam distillation is a relatively simple and inexpensive method of extracting volatile compounds from plant materials, making it a popular choice for small-scale producers and hobbyists.
3. In your experiment, you will weigh out between 0.25 g and 0.50 g of sodium hydrogen
carbonate. If you start with 0.45 g of sodium hydrogen carbonate, how much 3.0 M
HCI should you add to get the most NaCl?
you need to add 1.79 mL of 3.0 M HCl to react with 0.45 g of NaHCO3 and produce the most NaCl.
StepsTo determine how much 3.0 M HCl is needed to react with 0.45 g of sodium hydrogen carbonate (NaHCO3) and get the most NaCl, you need to first calculate the number of moles of NaHCO3 that you have:
molar mass of NaHCO3 = 84.01 g/mol
moles of NaHCO3 = mass / molar mass = 0.45 g / 84.01 g/mol = 0.00536 mol
Next, you need to determine the stoichiometry of the reaction between NaHCO3 and HCl. The balanced chemical equation for this reaction is:
NaHCO3 + HCl → NaCl + H2O + CO2
From this equation, you can see that one mole of NaHCO3 reacts with one mole of HCl to produce one mole of NaCl. Therefore, you need 0.00536 moles of HCl to react with 0.00536 moles of NaHCO3.
To calculate the volume of 3.0 M HCl needed to provide 0.00536 moles of HCl, you can use the following equation:
moles of solute = concentration x volume of solution (in liters)
Rearranging this equation to solve for the volume of solution gives:
the volume of solution = moles of solute/concentration
Plugging in the values gives:
volume of solution = 0.00536 mol / 3.0 mol/L = 0.00179 L or 1.79 mL
Therefore, you need to add 1.79 mL of 3.0 M HCl to react with 0.45 g of NaHCO3 and produce the most NaCl.
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look at the reaction and Ans
zinc carbonate+ sulfuric acid = zinc sulfate + carbon Dioxide + water
where did the hydrogen in water come from the reaction?
where did carbon from carbon dioxide come from?
In the given reaction:
zinc carbonate + sulfuric acid = zinc sulfate + carbon dioxide + water
The sulfuric acid was the source of the hydrogen in water. In the process, zinc carbonate (ZnCO3) and sulfuric acid (H2SO4) combine to create zinc sulfate (ZnSO4), carbon dioxide (CO2), and water. (H2O).
The carbon in zinc carbonate is what produces carbon dioxide (CO2). (ZnCO3). Zinc carbonate (ZnCO3) and sulfuric acid (H2SO4) interact during the process to produce zinc sulfate (ZnSO4), carbon dioxide (CO2), and water. (H2O).
The sulfuric solution is where water gets its hydrogen from. A substance called sulfuric acid is made up of the elements of hydrogen, sulfur, and oxygen.
Hydrogen ions (H+), which combine with the hydroxide ions (OH-) from the zinc carbonate to create water, are released into the solution when sulfuric acid reacts with zinc carbonate.
The carbon particle in the zinc carbonate molecule is where the carbon in carbon dioxide originates. Compounds containing zinc, carbon, and oxygen make up zinc carbonate. The carbon atom joins two oxygen atoms from the sulfuric acid during the reaction to create carbon dioxide. (CO2).
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Glutamic acid is an amino acid with pKa values of 2.19, 4.25 and 9.67, a-ketoglutarate is a bivalent organic acid. What is the approximate charge
difference between glutamic acid and a-ketoglutarate at pH 9.5?
a) 1 1/2
b) 2
c) 0
d) 1/2
e) 1
The approximate charge difference between glutamic acid and a-ketoglutarate at pH 9.5 would be 1. Option E.
Charge difference between 2 amino acidsAt pH 9.5, the protonation state of glutamic acid and a-ketoglutarate can be determined as follows:
Glutamic acid: At pH 9.5, the carboxyl group (-COOH) will be deprotonated, and the amino group (-NH2) will be protonated, giving the species -COO-CH2-CH(NH3+)-COO-.
The side chain carboxyl group (-COOH) can also be deprotonated to a small extent, giving the species -COO-CH2-CH(NH3+)-COO- and -COO-CH2-CH(NH2)-COO-. At this pH, the predominant species will be the first one, since the pKa of the carboxyl group is 2.19, which means that it will be mostly deprotonated at pH 9.5.
a-ketoglutarate: At pH 9.5, both carboxyl groups (-COOH) will be deprotonated, giving the species -COO-CH2-CO-CH2-COO-.
Therefore, the charge difference between glutamic acid and a-ketoglutarate at pH 9.5 can be calculated by subtracting the number of positive charges (protonated amino group) and negative charges (deprotonated carboxyl groups) in a-ketoglutarate from the corresponding charges in glutamic acid:
Glutamic acid: -1 (protonated amino group) - 2 (deprotonated carboxyl groups) = -3
a-ketoglutarate: 0 (no protonated amino group) - 2 (deprotonated carboxyl groups) = -2
Therefore, the charge difference is: -3 - (-2) = -1
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How many particles of gold is 2.7 moles of gold?
Answer:
1.63 × 10²⁴ particles
Explanation:
The equation to find the number of particles is:
Number of particles = Number of moles × Avagadro's constant
Number of particles = 2.7 × 6.02 × 10²³
∴ Number of particles = 1.63 × 10²⁴
HELPPPP
A student dissolves 0.03450 mol of solid salt in 49.83 g of distilled water and observes the temperature of the water rise from 25.2˚C to a final temperature of 31.4˚C. If the calorimeter constant is 37.4 J/˚C, what is the calculated enthalpy of the reaction of the salt in units of kJ/mol? Explain how you would go about solving the problem and show all work for each step in your solution.
The heat of reaction for the dissolution of the salt can be obtained to be 335 kJ/mol.
What is the heat capacity?Heat capacity is the amount of heat energy required to raise the temperature of a substance by a certain amount. More specifically, it is defined as the amount of heat energy required to raise the temperature of a substance by one degree Celsius or one Kelvin. The heat capacity is typically measured in units of joules per degree Celsius (J/°C) or joules per Kelvin (J/K).
We know that the heat that is absorbed can be obtained from;
H = mcdT
H = 49.83 g * 37.4 J/˚C * ( 31.4˚C - 25.2˚C)
H = 11.55 kJ
Then we have;
Hrxn = 11.55 kJ/ 0.03450 mol
= 335 kJ/mol
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Help with homework for work sheet
The theoretical yield of the ammonia that is produced in this reaction is 43.9g.
What is the moles?The mole is commonly used to express the amount of a substance in a chemical reaction or to compare the amount of different substances.
Number of moles of N2
1 mole of N2 occupy 22.4 L
x moles of N2 occupies 29 L
x = 1.29 moles
Number of moles of H2 is;
14g/ 2 g/mol = 7 moles
Now;
1 mole of N2 reacts with 3 moles of H2
x moles of N2 reacts with 7 moles of H2
x = 2.33 moles
Then N2 is the limiting reactant
If 1 mole of N2 produces 2 moles of NH3
1.29 moles of N2 will produce 1.29 * 2/1
= 2.58 moles
Mass of NH3 = 2.58 moles * 17 g/mol
= 43.9g
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you’ve had a light snack that has 14 grams of glucose, 4 grams of olive oil, and 3 grams of amino acids. How many calories are in your snack?
The total number of calories in snack that has 14 grams of glucose, 4 grams of olive oil, and 3 grams of amino acids is 141calories.
Given the mass of glucose = 14g
The mass of olive oil = 4g
The mass of amino acids = 3g
To calculate the amount of calories in the snack, we first need to look at the calories per gram of each component of the snack:
Glucose: 4 calories per gram
14 grams of glucose x 4 calories per gram = 56 calories
Olive oil: 9 calories per gram
4 grams of olive oil x 9 calories per gram = 36 calories
Amino Acids: 4 calories per gram
3 grams of amino acids x 4 calories per gram = 12 calories
Now that we have the calories per gram for each component, we can add them together to get the total number of calories in the snack:
56 calories from glucose + 36 calories from olive oil + 12 calories from amino acids = 104 calories
Finally, we can add a 10% calorie adjustment for the other components of the snack (such as fat and fiber) to get the total number of calories:
104 calories + 10% (10.4 calories) = 141.4 calories
Therefore, the total number of calories in your snack is 141.
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Acceleration refers to the rate of change in an object’s 5.________
Answer:
velocity
Explanation:
What is the maximum mass of aluminum chloride that can be formed when reacting 28.0 g of aluminum with 33.0 g of chlorine?
Aluminum and chlorine react to generate aluminium chloride, according to a balanced chemical equation: 2Al + 3Cl2 2AlCl3. A quantity of aluminium chloride up to 139.5 g can be produced.
What is the most amount of aluminium chloride that can be created when 27 g of aluminium and 32 g of chlorine are combined?When the limiting reagent is totally transformed into products, the maximum amount of product is produced. Two moles of aluminium chloride are created by a full reaction between three moles of chlorine. Hence, 46.4 g of aluminium chloride is the maximum mass that can be produced.
The amount of aluminium and chlorine in the specified masses can be calculated as follows:
Number of moles of aluminum = 28.0 g / 27 g/mol = 1.04 mol
Number of moles of chlorine = 33.0 g / 35.5 g/mol = 0.93 mol
We may get the theoretical yield of aluminium chloride using the balanced equation: 2Al + 3Cl2 → 2AlCl3
1.04 mol Al × (2 mol AlCl3 / 2 mol Al) × (133.34 g AlCl3 / 1 mol AlCl3) = 139.5 g AlCl3
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How many total atoms are there in 62.5 g
of carbon disulfide ( CS2)?
Total atoms:
Answer:
first molecular mass of cs2= 12+2×32=76amu
no of moles=62.5/76=0.822moles
total no of molecules=6.022×[tex]10^{23}[/tex]×0.822=4.95×[tex]10^{23}[/tex]
total no of atoms ( one carbon disulfide has 3 atoms)=3×4.95×[tex]10^{23}[/tex]=14.85×[tex]10^{23}[/tex] atoms
Explanation:
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In 62.5 g of carbon disulfide (CS2), there are approximately 1.48 x 10^24 total atoms. This is calculated by first finding the number of moles in 62.5 g, then multiplying this by the number of atoms in each mole (Avogadro's number).
Explanation:To calculate the total atoms in a 62.5 g of carbon disulfide (CS2), you need to first find the molar mass of CS2 which is 76.14 g/mol (12.01 g for C + 2 * 32.06 g for S). Using Avogadro's number (6.02 x 10^23) which represents the number of entities in a mole, we can calculate the number of moles and then the total number of atoms.
First, calculate the number of moles in 62.5 g of CS2: 62.5 g / 76.14 g/mol = 0.820 moles
Second, calculate the total atoms: 0.820 moles * 3 atoms/mole * 6.02 x 10^23 = 1.48 x 10^24 atoms
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How is an oxbow lake and a deep meander different? its for 14 points.
Answer: Oxbow-shaped meanders have two sets of curves: one curving away from the straight path of the river and one curving back. An oxbow lake starts out as a curve, or meander, in a river.
Explanation:
WORTH 100 POINTS, ANSWER ALL PARTS
INFO. An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of the compound by mass is composed of tellurium.
Part A. What quantity in moles of Te are present in 100.00 g of the compound?
Part B. What is the mass percent of Br in the compound?
Part C. What quantity in moles of Br are present in 100.00 g of the compound?
Part D. Determine the empirical formula of the unknown compound.
Part E. Provide the correct IUPAC name of the unknown compound.
20.00 moles of helium are mixed with 5.00 mole of oxygen gas in a 15.00 L container at 22.0 0C. Calculate the mole fraction of oxygen gas in the mixture.
The total Mole fraction of oxygen is 0.20 or 20% .
What is the gas mixture's formula?P=n(RTV)=n×const. Only the quantity is affected by the gas's nature in the calculation. Let's assume that we have a mixture of two ideal gases that are present in equal quantities based on this supposition.
The total moles of gas in the combination must first be determined:
Total moles of gas = moles of helium + moles of oxygen
Total moles of gas = 20.00 + 5.00
Total moles of gas = 25.00 moles
Next, we need to calculate the mole fraction of oxygen gas:
Mole fraction of oxygen = moles of oxygen / total moles of gas
Mole fraction of oxygen = 5.00 / 25.00
Mole fraction of oxygen = 0.20 or 20% (rounded to two decimal places)
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50 points
Which type of process is this.
Chemical Process
Physical Process
Nuclear Process
Explanation:
That's Nucleus process