Question

how many moles are present in 34 gram of NH3

Answer 1

2 moles are present in 34 gram of NH3.

Answer 2

Given: 34 grams of ammonia.

To find: We have to find the number of moles.

Solution:

The chemical formula of ammonia is $NH_3$.

The atomic mass of N is 14 and the atomic mass of H is 1.

Thus the molecular mass of ammonia is

$14 + 2 \times 3 \\ 14 + 3 \\ = 17$

The molecular mass of ammonia is 17 grams.

17 grams of ammonia occupies 1 mole.

Thus 34 grams of ammonia will occupy 34/17=2 moles.

Thus 2 moles are present in 34 grams of ammonia.