20
32
14
12
Correct answer is B
Molecular mass = vapour density X2
Mm of XO2 = x + 16(2) = x + 32
vapour density = 32
∴ x + 32 = 32 × 2
x + 32 = 64
x = 64 - 32
x = 32
∴ the relative molecular mass of X is 32
Relative molecular mass = vapour density × 2
NaCl(s) does NOT conduct electricity, but N(aq) does. This is because ...
During the vulcanization of rubber, sulphur is added to ...
The boiling point of pentane is higher than that of propane because? ...
The brown fumes given off when trioxonitrate (V) acid is heated consist of ? ...
Which of these cell notations is the correct representation of a Daniell cell? ...
Given that the order of reactivity of four metals is P>Q>R>S, which of the following reacti...