Question

find the mass of nitrogen in 120kg of ammonium nitrate (N=14 , O=16 , H=1)​

Answer 1

Answer:

120 +14 16 H=2 ammonium

Answer 2

There is 21 kg of nitrogen present in 120 kg of ammonium nitrate.

Given,

Mass of ammonium nitrate = 120 kg

To find,

The mass of nitrogen in the given mass of ammonium nitrate.

Solution,

This question can easily be solved using the unitary method.

we know, that the molecular mass of ammonium nitrate ($NH_4NO_3$) = 80g

Using the unitary method,

14 g nitrogen is present in 80 g ammonium nitrate

⇒ 14/80 g nitrogen is present in 1 g ammonium nitrate

⇒ 14/80 × 1000 g nitrogen present in 1000 g ammonium nitrate

⇒ 175 g nitrogen present in 1 kg ammonium nitrate

⇒ 175 × 120 g nitrogen present in 120 kg ammonium nitrate

⇒ 21 kg nitrogen present in 120 kg ammonium nitrate.