Question

How to calculate the number of particles of 7grm of nitrogen molecule?

Answer 1

$the \: mole \: of \: itrogen \: \: \\ \\ 7 \div 14 = 0.5 \\ \\ then \ \: number \: of \: molecle \: is \: \\ 0.5 \times 6.022 \times {10}^{ - 34} \\ \: therfor \: = 3.011 \times {10}^{ - 34}$
Thanks