Answer:
Hormones
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When 3.0 moles of hydrogen peroxide decompose at 1.0 atm and 23°C, approximately 36.78 liters of oxygen gas are produced according to the ideal gas law.
To find the volume of oxygen gas produced when 3.0 moles of hydrogen peroxide decompose at a pressure of 1.0 atm and a temperature of 23°C, you can use the ideal gas law:
PV = nRT
Where:
- P is the pressure (1.0 atm).
- V is the volume (what we want to find).
- n is the number of moles of gas (1.5 moles of O2 since 1 mole of O2 is produced for every 2 moles of H2O2).
- R is the ideal gas constant (approximately 0.0821 L.atm/mol.K).
- T is the temperature in Kelvin (23°C needs to be converted to Kelvin, which is 296.15 K).
First, calculate the number of moles of O2 produced:
n = 3.0 moles of H2O2 * (1 mole of O2 / 2 moles of H2O2) = 1.5 moles of O2
Now, plug in the values into the ideal gas law and solve for V:
1.0 atm * V = 1.5 moles * 0.0821 L·atm/mol·K * 296.15 K
Now, calculate the volume:
V = (1.5 moles * 0.0821 L·atm/mol·K * 296.15 K) / 1.0 atm
Calculate the volume:
V ≈ 36.78 L
So, the volume of oxygen gas produced when 3.0 moles of hydrogen peroxide decompose at 1.0 atm and 23°C is approximately 36.78 liters.
Learn more on ideal gas law here;
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B. the change in temperature the object undergoes.
C. the initial amount of Calories in the object.
D. the mass of the object.
The amount of heat transferred from an object depends on all of the following except the initial amount of Calories in the object. The answer is letter C. The equation to be used to calculate the heat release when solid melts is the enthalpy of melting. It is represented as H = mCpT where H is the heat released after phase change, m is the mass of the substance, Cp is the specific heat capacity of the substance and T is the change in temperature.
The pH of a 0.020 M aqueous solution of propionic acid is 1.70.
Aqueous solution is defined as a chemical mixture in which water serves as the solvent. Aqueous solutions are made up of water and one or more dissolved materials. Solids, gases, or other liquids can all dissolve in an aqueous solution. A mixture needs to be stable in order to be considered a true solution.
pH is defined as a scale that is used to describe an aqueous solution's acidity or basicity. A high pH in the body can happen for a number of reasons, such as faulty kidney/liver function, digestive issues, drug side effects, and lung issues. When the body's levels of carbon dioxide, an acid, are too low, respiratory alkalosis occurs.
pH = -log[H+]
pH = -log [ aqueous solution ]
pH = - log [ 0.020 ]
pH = 1.70
Thus, the pH of a 0.020 M aqueous solution of propionic acid is 1.70.
To learn more about aqueous solution, refer to the link below:
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a.) -133 kJ
b.) +133 kJ
c.) +133,170 kJ
d.) -6.65 x 10^-3
Answer: C
Explanation:
This is basic stoichiometry
4.5 X 10^20 Atoms x (1 mole/ 6.02 X 10^23 atoms) = 7.48 X 10^-4 moles Ag
so the answer would be C.
That water turned into various types of gases found in the earth's early atmosphere.
B.
That amino acids, fats, and nucleic acids might have formed in the waters of the past.
C.
That nitrogen gases, hydrogen gas, methane, and ammonia were formed in the waters of the past.
D.
That water turned into amino acids and fat, but nucleic acids were caused by lightning.