Question

A sample of gas at 250 K has a pressure of 0.857 atm and a volume of 115 L. How many moles of gas are in the sample?

Answer 1

0.208 mol

Step-by-step explanation:

Assuming the gas sample behaves like an ideal gas, we can solve this problem by using the following formula:

• PV = nRT

Where:

• P = 0.857 atm

• V = 115 L

• n = ?

• R = 0.082 atm·L·mol⁻¹·K⁻¹

• T = 250 K

We input the data:

• 0.857 atm * 115 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 250 K

And solve for n:

• n = 0.208 mol