A. 42
B. 45
C. 126
D. 180
Correct Answer: Option D
Explanation
Molecular formula = (empirical formula x n)
where n= (1,2,3,…)
CH2O=12+(2×1)+16=30
Relative molecular mass = (30 x n)
From the options, only 180 is a multiple of 30, when n=6.
![A compound has an empirical formular CH2O and molecular mass of 90. [H = 1.00, C = 12.0, O = 16.0]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A compound has an empirical formular CH2O and molecular mass of 90. [H = 1.00, C = 12.0, O = 16.0]")
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