Question

hint: the answers are not molar mass! please show your work and explain

What is the mass of a silicon dioxide molecule ?

What is the mass of a dinitrogen tetrafluoride molecule ?

What is the mass of a carbon tetrabromide molecule ?

Answer 1

1)

Sio2 molarmass = 60.08 g/mol

1 mol of any substance contains Na of molecules = 6.023*10^23 molecules

so that ,

mass of 1 SiO2 molecule = 60.08/(6.023*10^23)

                        = 9.975*10^-23 g

2) N2F4 molarmass = 104.01 g/mol

so that,

mass of 1 N2F4 molecule = 104.01/(6.023*10^23)

           = 1.73*10^-22 g

3) CBr4 molarmass = 331.63 g/mol

so that,

mass of 1 CBr4 molecule = 331.63/(6.023*10^23)

        = 5.5*10^-22 g