Some Basic Concepts Of Chemistry Question 42
Question: A mixture of $ NH _4NO{ _3} $ and $ {{(NH _4)}_2}HPO _4 $ contain 30.40% mass per cent of nitrogen. What is the mass ratio of the two components in the mixture?
Options:
A) 2 : 1
B) 1 : 2
C) 3 : 4
D) 4 : 1
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Let w.t. of $ NH _4NO _3 $ and $ {{( NH _4 )}_2}HPO _4 $ are x and y gram respectively $ \frac{\frac{x}{80}\times 2\times 14+\frac{y}{132}\times 2\times 14}{x+y}\times 100=30.4 $
$ \Rightarrow x:y=2:1 $
