First slide

Group15 or Nitrogen family

Question

Which one has the highest percentage of nitrogen

Easy

A

Urea
B

Ammonium sulphate
C

Ammonium nitrate
D

Calcium nitrate

Solution

${NH}_{2} {CONH}_{2}$
$%$ of $N = \frac{Mass of N}{Mass of compound} \times 100 = \frac{28}{60} \times 100 = 46 %$ .

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