What will be the standard molar volume of He, if its density is 0.1784 g/L at STP?

Question

What will be the standard molar volume of He, if its density is 0.1784 g/L at STP? (A) 11.2 L (B) 22.4 L (C) 5.6 L (D) 2.8 L

Tardigrade Admin · Accepted Answer

Standard molar volume is the volume occupied by 1 mole of a gas at STP. 0.1784 g of He occupies volume = 1 L 4 g (1 mole) of He occupies (4/0.1784) = 22.4 L

Q. What will be the standard molar volume of He, if its density is $0.1784 g / L$ at $STP$ ?

$11.2 L$

$22.4 L$

$5.6 L$

$2.8 L$

Standard molar volume is the volume occupied
by $1$ mole of a gas at $STP$ .
$0.1784 g$ of $He$ occupies volume $= 1 L$
$4 g$ ( $1$ mole) of $He$ occupies $\frac{4}{0.1784} = 22.4 L$

Q. What will be the standard molar volume of He, if its density is 0.1784g/L at STP?

11.2L

22.4L

5.6L

2.8L