A gas has a volume of 27.5 L at 302 K and 1.40 atm. How many moles are in the sample of gas?

1.55 mol

Step-by-step explanation:

We can use the Ideal Gas Law to solve this problem.

pV = nRT Divide both sides by RT

n = (pV) / (RT)

dа ta:

p = 1.40 atm

V = 27.5 L

R = 0.082 06 L·atm·K⁻¹mol⁻¹

T = 302 K

Calculations:

n = (1.40 * 27.5) / (0.082 06 * 302)

= 1.55 mol