Question

What is the number of moles of 500 liters of He gas at STP?

A) 0.2 mol
B) 90 mol
C) 0.05 mol
D) 22 mol

Answer 1

22 mol

Step-by-step explanation:

Answer 2

The correct answer is D

Step-by-step explanation:

Step 1: Data given

Volume of helium = 500 L

STP:

⇒ 25°C = 298 Kelvin

⇒ 1.00 atm

⇒ 22.4 L

This means 1 mole of Helium gas at STP has a volume of of 22.4 L

Since 22.4 L of Helium gas = 1 mol

Then 500 L of helium gas = (500L/ 22.4L) * 1 mol = 22.3 mol

The correct answer is D