Question

Calculate the mass of 6.022 x 1023 number of N2 molecules.

Answer 1

n=6.022*10^23

M=14*2=28

6.022*10^23/6.022*10^23*28

=7

Answer 2

The mass of $6.022\times 10^{23}$ number of $N_2$ molecule is 28 grams.

Explanation:

In this question, we need to find the mass of $6.022\times 10^{23}$ number of $N_2$ molecule.

$1\ \text{mole}=6.023\times 10^{23}\ \text{atoms}$

Number of moles is given by :

$n=\dfrac{\text{mass of N2 molecules}}{\text{molar mass of N2 molecules}}$

Mass of N₂ = No. of moles × Molar mass of N₂

$\text{mass}=1\ \text{mole}\times 28u\\\\mass\ of\ N_2=28\ g$

Therefore, we can say that the mass of $6.022\times 10^{23}$ number of $N_2$ molecule is 28 grams.

Learn more,

Mole concept

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