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WAEC Chemistry 2018 Paper

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Question : 29

Total: 50

Which of the following CANNOT be an empirical formula?

$CH$
$CH_{2}$
$P_{2}O_{5}$
$N_{2}O_{4}$

Solution:

The empirical formula is always in the ratio of the smallest positive integer, hence, $N_{2}O_{4}$ has an empirical formula $NO_{2}$ .

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