A. CH
B. CH2
C. P2O5
D. N2O4
Correct Answer: Option D
Explanation
The empirical formula is always in the ratio of the smallest positive integer, hence, N2O4 has an empirical formula NO2.
![What is the molecular formula of a compound with empirical CH2O and vapour density of 90? [H = 1, C = 12, O = 16]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "What is the molecular formula of a compound with empirical CH2O and vapour density of 90? [H = 1, C = 12, O = 16]")
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