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JAMB Chemistry 2024 Paper

Question : 41

Total: 138

_3

and a molar mass of 30 is

Solution:

Concept:

The molecular formula is a whole-number multiple of the empirical formula.

Explanation:

Let the molecular formula be

(\mathrm{CH}_3)_n

Molar mass of

\mathrm{CH}_3

12 + 3(1) = 15

Given total molar mass is

30

Therefore,

n = \frac{30}{15} = 2

So the molecular formula is

(\mathrm{CH}_3)_2 = \mathrm{C}_2\mathrm{H}_6

Answer:

\mathrm{C}_2\mathrm{H}_6

is the correct molecular formula.

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