Some Basic Concepts Of Chemistry Question 124
Question: An analysis of organic compound gave 74.0% C, 8.65% of H and 17.3% N. What is the empirical formula of compound?
Options:
A) $ C _5H _8N $
B) $ C _{10}H _{12}N $
C) $ C _5H _7N $
D) $ C _{10}H _{14}N $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Relative number of atoms, For $ C=\frac{74}{12}=6.1, $
For $ H=\frac{8.65}{1}=8.65, $
For $ N=\frac{17.3}{14}=1.2 $
Simplest ratio: For $ C=\frac{6.1}{1.2}=5,H=\frac{8.65}{1.2}=7,,N=\frac{1.2}{1.2}=1; $
Hence, empirical formula $ =C _5H _7N $
