What is the relative molecular mass of a compound which has empirical formula (CH_{2}O)? [C= 12, H= 1, O= 16]
-
A.
42 -
B.
45 -
C.
126 -
D.
180
Correct Answer: Option D
Explanation
Molecular formula = (empirical formula x n)
where n= (1,2,3,…)
(CH_{2}O = 12 + (2times 1) + 16 = 30)
Relative molecular mass = (30 x n)
From the options, only 180 is a multiple of 30, when n=6.