If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate its vapour density.

A. 196
B. 49
C. 106
D. 82

Correct Answer:

Option B = 49

Explanation

Molecular mass = Vapour Density x 2

Vapour Density = Molecular Mass/2
Where Molecular mass = 98g/mol

Vapour Density = 98/2
Vapour Density = 49g/mol