Avogadro's & Dalton's Laws and more

Front

What is Dalton's Law of Partial Pressures?

Back

Dalton's Law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of each individual gas.

Front

Define Avogadro's Law.

Back

Avogadro's Law states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules.

Front

If 3 moles of gas occupy a certain volume, how many moles will occupy the same volume under the same conditions according to Avogadro's Law?

Back

3 moles.

Front

What is the formula to calculate total pressure in a gas mixture?

Back

Total Pressure = P1 + P2 + P3 + ... + Pn (where P1, P2, P3, etc. are the partial pressures of each gas).

Front

How do you convert mmHg to atm?

Back

To convert mmHg to atm, divide the pressure in mmHg by 760 (1 atm = 760 mmHg).

Front

What is the relationship between pressure and volume in gases at constant temperature?

Back

According to Boyle's Law, pressure and volume are inversely related; as volume increases, pressure decreases, and vice versa.

Front

What happens to the volume of a gas when the temperature increases at constant pressure?

Back

According to Charles's Law, the volume of a gas increases as the temperature increases, provided the pressure remains constant.

Front

Calculate the total pressure in atm if helium's pressure is 0.8 atm, nitrogen's pressure is 550 mmHg, oxygen's pressure is 0.5 atm, and argon's pressure is 400 mmHg.

Back

Total Pressure = 0.8 atm + (550 mmHg / 760 mmHg/atm) + 0.5 atm + (400 mmHg / 760 mmHg/atm) = 2.55 atm.

Front

What is the significance of the ideal gas law?

Back

The ideal gas law (PV=nRT) relates pressure (P), volume (V), number of moles (n), the ideal gas constant (R), and temperature (T) for an ideal gas.

Front

What is the pressure of argon (Ar) in atm if its pressure is 225 mmHg?

Back

Pressure in atm = 225 mmHg / 760 mmHg/atm = 0.296 atm.