Question

Calculate the number of moles of N2in 5.6g of nitrogen gas

Answer 1

Number of moles= given mass/molar mass

= 5.6/28

= 0.2 moles.

Answer 2

The number of moles of $N_2$ in 5.6 g of nitrogen gas is 0.2

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

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

Given mass = 5.6 g

Molar mass = 28 g

$\text{Number of moles of} N_2=\frac{5.6g}{28g/mol}=0.2moles$

Thus the number of moles are 0.2

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