Question

how many moles of N are in 0.191g of N2O?

Answer 1

1 mole of $N_2O$ contains= 2 mole nitrogen

.191 g $N_2O$ = $\frac{0.191}{44}\ mole\ N_2O=0.00434\ mole$

$2\times0.00434=0.00868\ moles \ Nitrogen$