Chemistry JAMB

An oxide XO2 has a vapour density of 32. What is the atomic mass of X?

A. 32
B. 20
C. 14
D. 12

Correct Answer:

Option A – 32

Explanation

XO2 → 32 * 2
X + 16 * 2 → 64
X = 64 – 32
=32

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