Question

How many moles of n are in 0.195 g of n2o?

Answer 1

Explanation:

As molar mass of $N_{2}O$ is 44.013 g/mol and it is given that its mass is 0.195 g.  

Therefore, calculate its number of moles as follows.

              No. of moles = $\frac{mass}{\text{molar mass}}$

                                    = $\frac{0.195 g}{44.013 g/mol}$

                                    = 0.0044 mol

Here, in 1 mole of $N_{2}O$ there is 2 mole of N. Thus, moles of N present in it is calculated as follows.

                             $2 \times 0.0044 mol$

                                 = 0.0088 mol

Thus, we can conclude that in 0.195 g of $N_{2}O$ there are 0.0088 mol of N.

Answer 2

0.195g N2O x 2moles of N / 28g of N = 5.46 moles of N



2X14= 28g.