Question

The initial pressure of 0.31 moles of gas in a drum is 742 torr. If gas is added to the drum and the final pressure is 759 torr, how many moles of gas are in the drum? Hint: for this problem, you do not have an equation in the Introduction section, but based on the relationship between pressure and volume, what can you determine about the relationship between pressure and the number of moles?

Answer 1

0.3171 moles

Step-by-step explanation:

The computation of the number of moles of gas in the drum is shown below;

The ideal gas equation is

PV = nRT

where

P denotes the pressure of the gas

V denotes the volume of the container

n denotes the number of moles of gas

R denotes the Gas constant

T denotes the temperature

Also P proportionate to n

Now the following formula should be used

P_1 ÷ P_2 = n_1 ÷ n_2

742 ÷ 759 = 0.31 ÷ n_2

n_2 = 759 × 0.31 ÷742

= 0.3171 moles