Question

calculate the number of moles in 34 grams of NH3[ atomic mass of N =14u and H = 1u

Answer 1

see the image for the answer

Answer 2

Given :

34 grams of $NH_3$

To find :

Calculate the number of moles

Solution:

Atomic mass of Nitrozen = 14 u

Atomic mass of Hydozen = 1 u

Formula :

$\text{number of moles}=\frac{\text{Mass of element}}{\text{Molar mass of element}}$

Mass of $NH_3$= 34 grams

Molar mass = $14+3 \times 1$

Molar mass of $NH_3$=17 grams

So, Number of moles = $\frac{34}{17}=2$

Hence The number of moles in 34 grams of $NH_3$is 2