Question

Find out the number of moles of molecules present in the samples given below
GMM-N2=28g,H2O=18g
A)56gN2 B)90gH2O

Answer 1

Answer:

Explanation:

A)56gN2

Number of mole molecules = mass/GMM

                                              =56/28

                                              =2

B)90gH2O

Number of mole molecules = mass/GMM

                                              =90/18

                                              =5

Answer 2

A) 28g N2=1 mole

1g of N2=1/28mole

56g of N2=1/28 ×56=2 mole

B) 18g H2O=1 mole

1 g H2O=1/18g

90g H2O=1/18 ×90=5 mole