Question

calculate the mass of nitrogen contained in 1 kg of 1)kno3
2)NH4NO3

Answer 1

See attachment..... Hope it will help ^_^

Answer 2

Answer:

For 1: Mass of nitrogen will be 138.47 grams.

For 2: Mass of nitrogen will be 350 grams.

Explanation:

Conversion factor: 1 kg = 1000 g

• For 1: $KNO_3$

Molar mass of $KNO_3$ = 101.1 g/mol

Mass of nitrogen in $KNO_3$ = 14 g/mol

As, in 101.1 g/mol of $KNO_3$ contains 14 g/mol of nitrogen.

So, 1000 grams of $KNO_3$ will contain = $\frac{14g/mol}{101.1g/mol}\times 1000g=138.47g$ of nitrogen.

Hence, Mass of nitrogen in $KNO_3$ will be 138.47 grams.

• For 2: $NH_4NO_3$

Molar mass of $NH_4NO_3$ = 80 g/mol

Mass of nitrogen in $NH_4NO_3$ =28 g/mol

As, in 80 g/mol of $NH_4NO_3$ contains 28 g/mol of nitrogen.

So, 1000 grams of $NH_4NO_3$ will contain = $\frac{28g/mol}{80g/mol}\times 1000g=350g$ of nitrogen.

Hence, Mass of nitrogen in $NH_4NO_3$ will be 350 grams.