Question

How many moles of N are in 0.221 g of N2O?

Answer 1

Answer:

0.221 g of $N_2O$ have 0.010 mol of N

Explanation:

Mass of $N_2O= 0.221\ g$

Step 1

Calculation of moles of $N_2O$

$Mole=\frac{Mass\ in\ g}{Molecular\ mass}$

Molecular mass of $N_2O$ = 14 × 2 + 16 = 44

$Mole=\frac{Mass\ in\ g}{Molecular\ mass}$

$=\frac{0.221}{44} = 0.005\ mol$

Calculation of moles of N

1 mol of $N_2O$ has 2 moles of N

0.005 mol of $N_2O$ will have

                = 0.005 × 2 = 0.010 mol of N

So, 0.221 g of $N_2O$ have 0.010 mol of N

Answer 2

No.of moles of N2O= 0.221g/(14*2+16) =0.005022727moles
no.of moles of N = 0.005022727*2 =0.010045454moles