Question

calculate the no of atom in 56g of N2​

Answer 1

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$no \: of \: molecules \: = \frac{given \: mass}{molar \: mass} \times avagrado \: number$

$molar \: mass \: of n2 = 14 \times 2 = 28 g$

$= \frac{56}{28} \times 6.022 \times {10}^{23}$

$= 12.044 \times {10}^{23}$