Answer:
The correct answer is D
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
