Question

The number of moles of nitrogen atom in 56 g nitrogen gas is

Answer 1

given mass=56 g
molar mass of nitrogen=14 amu

no.of moles = given mass / molar mass

putting values we get no. of moles as 4

Answer 2

Answer: 4 moles

Explanation:-

To calculate the number of moles, we use the equation:

$\text{Number of Moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Calculating the number of moles in 56 g nitrogen gas

Molar mass of nitrogen gas $(N_2)$ = 28 g/mol

Putting the values in above equation, we get:  

${\text {moles of nitrogen}}=\frac{56g}{28g/mol}=2moles$

1 mole of $N_2$ gas contains 2 moles of nitrogen atoms.

2 moles $N_2$ gas contains =$\frac{2}{1}\times 2=4moles$ of nitrogen atoms.