The volume of methane is 69.15L.
Heat (Q) of methane =Heat(Q) of water
Q = mcΔt
water mass = volume(V) × pressure(P)
1L×1kg/L=1kg
298 K to 373k = 25°C to 100 °C
c water = 75.2J/mol K =4.2 J/g °C = 4200 J/kg °C
Heat of water (Q) = 1×4200 (100 -25)
Heat of water (Q) = 315000J
∴ Heat of methane = Heat of water = 315000 J
= 315 KJ
n (mol) methane = ΔH/Q
890.4/315 = 2.83
According to the ideal gas law,
PV = nRT
Where;
P = Pressure
V = Volume
n = amount of substance
R = ideal gas constant
T = temperature
Now,
V = nRT/P
V = 2.83 × 0.082 ×298/1
V = 0.23206 ×298/1
V = 69.15L
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In biology, a system is a collection of (blank)
(each made of multicellular tissues) that together perform a major function.
In biology, a system is a collection of organs (each made of multicellular tissues) that together perform a major function.
What is the organ about?In biology, a system refers to a collection of organs that work together to perform a specific function or set of functions. Organs are structures made of multiple types of tissues that work together to perform a specific task.
These tasks can be related to maintaining homeostasis, such as the circulatory system which transports oxygen and nutrients throughout the body, or to a specific function, such as the reproductive system which is responsible for the production of offspring.
Therefore, Organs within a system are highly specialized and have specific functions, but they also work together in concert to achieve the overall function of the system. For example, the digestive system is made up of several organs including the mouth, esophagus, stomach, small intestine, and large intestine.
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Why is it that some materials made up of entirely nonmetal atoms are soluble in water while some are not
some materials made up of entirely nonmetal atoms are soluble in water while some are not Due to different combinations of pairs created, which might either dissolve extremely well, or not dissolve whatsoever
The solubility of a substance in water depends on the nature of the chemical interactions between the substance and the water molecules. Some materials made up of entirely nonmetal atoms are soluble in water because they can form hydrogen bonds with the water molecules. These materials are called polar solvents and are typically composed of polar molecules, like those found in many organic compounds. For example, ethanol (C2H5OH) is a polar solvent that is composed of entirely nonmetal atoms and is soluble in water because it can form hydrogen bonds with the water molecules.On the other hand, some materials composed of entirely nonmetal atoms are not soluble in water because they do not form hydrogen bonds with the water molecules. These materials are called non-polar solvents and are typically composed of non-polar molecules, like those found in many hydrocarbons.
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What is the priority nursing intervention for a patient who experienced a chemical burn injury?
Respiratory and fluid status are primary nursing interventions for patients with chemical burns.
When treating, make sure that the causative agent is completely removed. Remove contaminated clothing and jewelry and use the shower if necessary to wash off the chemicals for at least 20 minutes. Protect your eyes from chemical contamination. Cover the burn with a clean bandage.
During the first few days after a burn, check your peripheral pulse frequently for restricted blood flow. Carefully monitor hourly fluid intake and urine output, as well as blood pressure and heart rate. Any changes should be reported immediately to the burn surgeon.
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If 6.4 g solid carbon dioxide were placed in the same container but it already contained air at 740 torr, what would be the partial pressure of carbon dioxide, PCO2
Given data
Mass of the piece of a solid carbon dioxide is m = 6.8 g
Volume of the solid carbon dioxide is V=4L
The temperature is T = 23°C = 296 K . The pressure of the air in the container is
740 Pho = 740 torr = atm 76
The temperature is T = 23 deg * C = 296K
The pressure of the air in the container is
Pho = 740 torr 740 760 atm
(a)The expression of ideal gas equation is given by,
PV = nRT
PV = (m/M) * RT
Where, P is the pressure in which the container after all the carbon dioxide is vaporizes.
M is the molar mass of the solid carbon dioxide (M = 44.01g / m * ol)
R is the universal gas constant R = (0.0832kJ / m * olK)
Substitute the all values in the above equation and calculate the value of pressure in which the container after all the carbon dioxide is vaporizes.
6.8 g 44.01 g/mol P(4L)= P= (0.0832 kJ/mol K) (296 K) (0.1545 mol) (0.0832 kJ/mol K) (296 K)
P = 0.951atm
(4L)Thus, the pressure in which the container after all the carbon dioxide is vaporizes is 0.951 atm.
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Terms that are true of respiration reaction (such C6H12O6 + 6O2 → 6CO2 + 6H2O) include?
A. Endothermic and acid-base
b. exothermic an acid-base
C endothermic and redox
D exothermic and redox
The Respiration reaction includes exothermic process and redox reaction. Hence, Option (D) is correct.
What is Respiration ?A process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.
C₆H₁₂O₆ + 6O2 → 6CO₂ + 6H₂O
Therefore, The Respiration reaction includes exothermic process and redox reaction. Hence, Option (D) is correct.
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Part A
Determine the value of Kp for the following reaction:
4HCl(g)+O2(g)⇌2Cl2(g)+2H2O(g)
Express the equilibrium constant to three significant digits.
To determine the value of Kp for a reaction, we need to know the concentrations of all the reactants and products at equilibrium.
In this case, we are not given the equilibrium concentrations, so we cannot directly calculate Kp. Instead, we can use the ideal gas law to relate the equilibrium concentrations to the partial pressures of the gases, and use those partial pressures to calculate Kp.The equation for the ideal gas law is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. If we assume that the reaction occurs at a constant volume and a constant temperature, we can use the ideal gas law to relate the equilibrium partial pressures of the gases to the concentrations of the gases.Given that we have no information about the equilibrium concentrations or partial pressures, we can not calculate Kp.
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This is really easy plz help me out 25 points
Will someone please help me with these physics questions.
Now assume that all of the potential energy went into kinetic right as it is about to hit the bottom. What would be the value for the kinetic energy? a. less
b. same
c. more
d. not information
The potential energy will go into kinetic right as it is about to hit the bottom. Then, the value will be the b) same for the kinetic energy.
When an object falls, its potential energy decreases, and its kinetic energy increases. A decrease in the potential energy is exactly the same as an increase in the kinetic energy. According to the law of conservation of energy, just before the lamp stops, the potential energy at the top of the lamp and the kinetic energy at the bottom must be equal. At the foot of the hill, the potential energy is zero and the final energy is all kinetic energy. We can equate these two values according to the law of conservation of energy. Adding the kinetic energy and the potential energy gives a constant (KE+PE=constant).
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CaCO3(s) + HCl(aq) -> CO2(g) + H2O(l) + CaCl2(aq)
Explanation:
[tex]CaCO _{3(s)} + 2HCl _{(aq)}→ CO _{2(g)} + H2O _{(l)} + CaCl _{2(s)}[/tex]
what is the mass of 7.80 moles of ammonium sulfate?
Answer: The mass is 1030.692 grams (1.03 x 10^3 grams if you apply sig figs)
This is a units conversion problem, we'll first need the molar mass of ammonium sulfate: 132.14 g/mol
Then we can solve so that:
7.80 moles (132.14 g/moles) = 1030.692 grams
energy transfer wet table information??
The energy is produced due to the process of beak down in the chemical process or reaction.
What is energy transfer and how can energy transfer?
That energy is stored in the bonds of the chemical compounds which include molecules and atoms. The point is released in the chemical reaction and the most power produces heat as a by-product, known as an exothermic reaction.
Energy may be released in a chemical reaction in the form of heat; that reaction is called exothermic. Reactions that require an input of heat to proceed may store some of that energy as chemical energy in newly formed bonds.
So we can conclude that Energy defined as the capacity to supply heat or do work is known as energy.
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What defines a "super acid" and what makes them unique?
A super acid is defined as an acid with acidity greater than 100% pure H2SO4. It can also be defined as a medium in which the chemical potential of the proton is higher than in pure Sulphuric Acid.
I rlly need help with my science hwk its due in tomorrow and I am stuck can any one help me plzz :)
Answer:
Sulfur dioxide relased by the industry=
25%
Explanation:
The amount of sulfur dioxide relased by the industry can be calculated by looking at the values of the other; transport and electricity generation. Since electricity generated sulfur dioxide is 69% + 6% of transport that equals 75%. Pie diagrams always equal a total of 100%.
so simply you minus 75 from 100: 100-75=25%.
A vitamin contains 9.2 x 10^23 iron atoms. How many moles of iron are in the tablet?
Answer:
Approx. 20 moles of iron.
Explanation:
There are approx.
6.022
×
10
23
iron atoms per mole of ion. This quantity, this number of iron atoms has a mass of
55.85⋅g . And of course, when we quote the mass of iron we say
55.85⋅g⋅mol−1 .
How many grams of mercury can be produced if 18.0 g of mercury (11) oxide decomposes?
Answer:
18.0 g of mercury (11) oxide decomposes to produce 9.0 grams of mercury
Explanation:
Mercury oxide has molar mass of 216.6 g/ mol. It gas a molecular formula of HgO.
The decomposition of mercury oxide is given by the chemical equation below:
2HgO ----> 2Hg + O₂
2 moles of HgO decomposes to produce 1 mole of Hg
2 moles of HgO has a mass of 433.2 g
433.2 g of HgO produces 216.6 g of Hg
18.0 of HgO will produce 18 × 216.6/433.2 g of Hg = 9.0 g of Hg
Therefore, 18.0 g of mercury (11) oxide decomposes to produce 9.0 grams of mercury
What does the entropy of a reaction describe?
A. The amount of randomnes in the system
B. The amount of usable energy in a reaction
C. The number of molecules in a system
D. The amount of heat present in the system
The type of bonding and the number of covalent bonds an atom can form with other atoms is determined by __________
The type of bonding and the number of covalent bonds an atom can form with other atoms is determined by number of unpaired electrons.
The number of unpaired electrons in the valence shell because covalent bond is equal to a chemical bond that involves sharing a pair of electrons between atoms in a molecule. When electrons are shared among atoms, they make a bond known as a covalent bond. Because atoms are sharing one pair of electrons, this covalent bond is known as a single bond. These atoms can do the equal aspect that the H atoms did; they proportion their unpaired electrons to make a covalent bond.
Thus, the number of unpaired electrons is useful in the type of bonding and the number of covalent bonds.
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1. How many moles of propane are present at STP if the volume is 65.0 L? Please show all work
Answer:
Therefore, there are 4.47 moles of propane present at STP in a volume of 65.0 L
Explanation:
First, we need to calculate the number of moles of propane present at STP. At STP, the temperature is 273 K and the pressure is 1 atm.
Using the Ideal Gas Law, we can calculate the number of moles of propane present in the given volume.
PV = nRT
n = 4.47 mol
Therefore, there are 4.47 moles of propane present at STP in a volume of 65.0 L
List the following elements in order from lowest boiling point to highest
- Aluminum Iodide
- Fructose
- Potassium Bromide
- Calcium Bromide
I WOULD REALLY APPRECIATE HELP! PLS NO LINKS! THANK YOU!
Answer:
Aluminum lodide - 680 degrees
fructose- 824 degrees
potassium bromide- 2,615 degrees
calcium bromide 3, 515 degrees
lowest boiling point is 680 and highest is 3,515.
hope this helps:)
Who goes to K12 and if so what grade
Answer:
Hey! I`m In K12. Currently in 7th, going into 8th next year. I have Mrs. Keefe and one of my teachers, what about y`all?
complete by describing what the change of the state of the matter will be for the process to occur
1. Solidification or freezing:
2. evaporation:
3.condensation:
4.sublimation:
5. Deposition or reverse sublimation:
Answer:
Freezing: Liquid turns into solid. Evaporation: Liquid turns into gas. Condensation: Gas turns into liquid. Sublimation: solid into gas. Deposition: Gas into solid.
Explanation:
1. How much energy (in calories and in Joules) will it take to raise the temperature of 75.0 g
of water from 20.0 to 55.0 °C? ( Specific Heat = 1 cal / ( g °C) and 4.184 J /(g°C) )
A. 2630 cal and 630. J
B. 2630 cal and 1.1 x 104 J
C. 1.1 x 10 + cal and 2630 J
D. 630. cal and 2630 J
E. None of these are correct.
I need help pls
Complete the following chemical formula and determine the final molarity of NaCl:
__ BaCl2(aq) + __ Na2SO4(aq) --> ____ + _____
You react 45g BaCl2 with an excess of Na2SO4 in 250mL of water. Find the molarity of NaCl produced.
A. 0.25
B. 0.58
C. 1.72
D. 3.82
Answer:
[NaCl] = 1.72 M
Explanation:
First of all, we balance the equation:
BaCl₂ + Na₂SO₄ → 2NaCl + BaSO₄
We convert mass of barium chloride to moles
45 g . 1mol / 208.23g = 0.216 moles
Ratio is 1:2. This means, that our moles of reactant may produce the double of moles, of product.
0.216 . 2 = 0.432 moles of NaCl are been produced.
Molarity is mol/L. We convert volume of water from mL to L
250 mL . 1L /1000 mL = 0.250 L
[NaCl] = 0.432 mol/0.250L = 1.72 M
Suppose that a chemist combines 231 mL of methane and 907 mL of chlorine at STP in a 2.00 L flask. The flask is then allowed to stand at 298 K. If the reaction reaches 75.9% completion, what is the total pressure in the flask
The total pressure in the flask is 1.320 times the total pressure.
What is pressure?Pressure is an important concept in chemistry, as it affects the physical behavior of gases and solids, and the rates at which reactions occur. Pressure is a measure of the force applied to an area, typically expressed in units of atmospheres (atm), or kilopascals (kPa).
Methane :
Mole fraction of methane = (231 mL / 2.00 L) = 0.1155
Partial pressure of methane = 0.1155 * Ptotal
Chlorine:
Mole fraction of chlorine = (907 mL / 2.00 L) = 0.4535
Partial pressure of chlorine = 0.4535 * Ptotal
Products:
Mole fraction of products = (75.9% com) = 0.759
Partial pressure of products = 0.759 * Ptotal
Total pressure = 0.1155*Ptotal + 0.4535*Ptotal + 0.759*Ptotal = 1.320*Ptotal
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Solve these 5 items in your notebook and take a clear and readable photo. PS. You need to balance the equation before u identify the type of chemical reaction.
Answer
bitly coin download
Explanation:
bitly coin download
In lab, a dialysis bag was filled with a 10% sucrose solution and placed in an unlabeled beaker filled with clear liquid. The dialysis bag was made of a semipermeable membrane that allowed the free passage of water, but was not permeable to sucrose. After two hours, the bag in the beaker decreased in size, lost volume, and became flaccid. Therefore, at the beginning of the experiment, the solution in the bag was ____________ compared to the solution in the beaker. g
Answer:
Of lower concentration or less concentrated
Explanation:
Osmosis is the movement of solvent from a region of lower concentration of solute to a region of higher concentration of solute through a semipermeable membrane in order to equalize the concentration of the solutions on both sides.
Since the membrane of the bag is semipermeable, then the fact that the bag in the beaker decreased in size, lost volume, and became flaccid indicates that the solution in the bag is of lower solute concentration than the solution in the beaker hence the movement of water molecules into the beaker by osmosis.
diatomic elements are important. what makes them different from other elemental substances?
Atoms follow the octet rule, which makes them more stable in pairs.
The diatomic elements oxygen and nitrogen have a slightly more complex structure. There is a double bond between the two O atoms in the O₂ dot structure. And there is a triple bond between the two N atoms in the N₂ dot structure. Diatomic elements are elements that are never found alone in nature. It is always bound to another atom. The diatomic state of this atom is much more stable than its unbonded state.
Everything around us contains energy, even if it doesn't move. All molecules and atoms have spins and vibrations, but these are all internal forces.
All atoms try to reach the lowest potential. Atom has a state of lower energy, implying maximum stability under certain external conditions.
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Diatomic elements are important. what makes them different from other elemental substances?
Diatomic elements are different from other elemental substances because they consist of two atoms of the same element bound together.
What are Diatomic elements?
Diatomic elements are elements that generally exist as molecules composed of two atoms of the same element. The seven elements that exist as diatomic molecules are hydrogen (H2), oxygen (O2), nitrogen (N2), fluorine (F2), chlorine (Cl2), bromine (Br2), and iodine (I2).
The two atoms form a covalent bond, meaning that each atom shares its outermost electrons with the other atom. This creates a strong bond between the two atoms, making the diatomic element more stable and less reactive than other elemental substances.
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Calculate the molarity of the following solution: 0.50 moles of MgCl2 in 150 milliliters of solution.
Answer:
3.333M
Explanation:
Basically,
Molarity=(moles of solute)/(litres of solution)
=(0.5 moles)/(150/1000)L
=3.333M
Calculate the amounts of p-acetamidophenol (in grams) and bromoethane (in milli- liters) that are used in this reaction. 5. What is activated carbon? What is it used for, either in the lab or other applications?
the amount of bromoethane (in milli- liters) that are used in this reaction is 74.13ml.
Mol wt of P-Acetamido phenol = 151.16. Mol wt of Bromoethane = 108.97. Mol wt of Acetophenetidin (product) = 179.22. Paraacetamido phenol, mol wt=151.16. Bromoethane= 108.97. By the law of mass action, 151.16 g P-Acetamido phenol will react 108.97g Bromoethane to get 179.22 g Acetophenetidin (product) and 80.91 g Hydrobromic acid as a bye product. Since the density of Bromoethane = 1.47g/cc, the quantity of Bromoethane in milliliters = 108.97/1.47 = 74.13 ml. Activated carbon, also known as activated charcoal, is a form of carbon that has been processed to have small, low-volume pores that increase the surface area available for adsorption or chemical reactions. Activated carbon is used for a wide range of industrial and environmental applications, including purifying air and water, removing impurities from liquids and gases, and recovering valuable chemicals. In the laboratory, activated carbon is commonly used to purify organic compounds, remove dissolved gases from liquids, and purify water.
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