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