The volume occupied by 1.58g of a gas at S.T.P is 500cm³. What is the relative molecular mass of the gas? [ G.M.V at S.T.P = 22.4dm³]

The volume occupied by 1.58g of a gas at S.T.P is 500cm³. What is the relative molecular mass of the gas? [ G.M.V at S.T.P = 22.4dm³]

A. 28
B. 32
C. 44
D. 71

Correct Answer:

Option D = 71

Explanation

500cm³ of the gas weighed 1.58

: 22400cm³ of the gas weight

[22400 X 1.58g] ÷ [ 500 ]

= 71