Some Basic Principles Of Organic Chemistry Question 70
Question: An organic compound gave the following results $ C=53.3%,H=15.6,N=31.1%, $ mol. wt. = 45, What is molecular formula of the compound?
Options:
A) $ C_2H_5N_2 $
B) $ C_2H_5N $
C) $ C_2H_7N $
D) $ C_2H_6N $
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Answer:
Correct Answer: C
Solution:
| Element | No.of Moles | Simple Ratio |
|---|---|---|
| C = 53.3 | 53.3/12 = 4.44 | 2 |
| H = 15.6 | 15.6/1 = 15.6 | 7 |
| N = 31.1 | 31.1/14 = 2.22 | 1 |
Hence, formula = $ C_2H_7N $
$ (CH_3CH_2NH_2) $ .
