Question

How many molecules are contained in a 6.05-g sample of dimethylmercury?

Answer 1

The molar mass of dimethylmercury is [200.59 + (15x2)] = 230.59 g/mol

number of molecules in the given sample =[ mass of sample/molar mass] x Avogadro number

                                                                            = [6.05x6.023x10²³]/ 230.59

                                                                            = 1.580x 10²²