Chemistry

Problem

Using the expression

n = \frac{\text{volume}}{\text{molar volume under the same conditions}}

and given that the volume of one mole of gas at STP is

22.7 \text{ dm}^3 \text{ mol}^{-1}

, calculate the amount in mol in each of the following at STP: a. a

2.45 \text{ dm}^3

\text{NO}_2

b. b

200 \text{ cm}^3

of Ar c. c

0.75 \text{ m}^3

\text{Cl}_2