Question

Which sample contain greatest number of molecule.1gram of water,1gram of
N2o4,1gram of
Nitrac acid,and 1gram of methane

Answer 1

Answer:

Explanation:

no. of molecules = (given mass / molar mass) × avogadro no.

(a) no. of molecules of water = (1 / 18) × 6.022 × 10^23

                                               = 3.3 × 10^22 molecules

(b) no. of molecules of N2O4 = (1 / 92) × 6.022 ×10^23

                                                = 6.5 ×10^21

(c) no. of molecules of nitric acid = (1 / 63) × 6.022 × 10^23

                                                      = 9.5 × 10^21

(d) no. of molecules of methane = (1 / 16) × 6.022 × 10^23

                                                     = 3.8 × 10^22

∴ 1 gram of methane has greatest no. of molecules.