PreLab Quiz: Experiment 3, The Molar Volume of Gases

Which observations support Boyle's Law?

Select one or more:

a. As gas pressure decreases, its volume increases.

b. When volume of a gas is decreased, its pressure will increase.

c. The product of a gas's pressure and volume is constant.

d. Pressure and volume both increase at the same rate.

a. As gas pressure decreases, its volume increases.

b. When volume of a gas is decreased, its pressure will increase.

c. The product of a gas's pressure and volume is constant.

According to Boyle's Law, what should happen to the pressure of an ideal gas when its volume is increased at the same temperature?

Select one:

a. The pressure of the gas stays the same.

b. The pressure of the gas increases and then decreases.

c. The pressure of the gas decreases.

d. The pressure of the gas increases.

c. The pressure of the gas decreases.

If, at 25°C and standard pressure, 2.98 mL of dry air are injected into a graduated cylinder, how many moles of dry air are in the sample space?

0.000122 mol

Suppose you are performing a gas-producing reaction to experimentally determine the molar volume of the gas.

Mg(s)+2HCl(aq)⟶MgCl2(aq)+H2(g)

A sample of Mg produces 21.5 mL of H2 gas. The gas is collected over water at an atmospheric pressure of 774.0 mm Hg  at 22 ^oC,  at which the vapor pressure of water is 19.8 mm Hg.

What is the experimental value for the molar volume of the hydrogen gas in L/mol?

24.4 L/mol

In the Ideal Gas Law, what does P stand for?

Select one:

a. Pressure

b. Protons

c. Plankton

d. Planning

a. Pressure

Dalton's Law of Partial Pressures states that the total pressure of a gas mixture is equal to the

(product, sum, value)

of the

(partial pressure of the primary component gas, partial pressures of all the component gases, partial pressure of the minority component gas)

as long as

(the gases do not react with each other., the volume of the container does not change, the temperature is greater than room temperature.)

sum

partial pressures of all the component gases

the gases do not react with each other

When using the Ideal Gas Law, pressure should be expressed in units of atmospheres. Convert 745.1 mmHg to atmospheres.

Select one:

a. 1.020 atm

b. 0.9553 atm

c. 14.90 atm

d. 0.9804 atm

d. 0.9804 atm

What is the literature value of the gas constant, R, in units of (L*kPa/molK)? Report the value with at least three significant figures.

8.314

Which is an example of an accurate manipulation of the Ideal Gas Law?

Select one:

a. PV=(RT)/n

b. PV=(nR)/T

c. (PV)/R=nT

d. PV=(nT)/R

c. (PV)/R=nT