Question

verify by calculating that 5 moles of CO2 and 5 moles of H2O do not have the same mass

Answer 1

CO2 has molar mass               = 44g mol–1 

5 moles of CO2 have molar mass = 44 × 5 

                                                     = 220 g 

H2O has molar mass                   = 18 g mol–1 

5 moles of H2O have mass         = 18 × 5 g 

                                                   = 90 g 
so mass is different

Answer 2

Hey mate.

1 mole of Co2 has ( 1 mole of carbon =12g)
and (2 mole of O=32g)
So total mass of 1 mole of Co2=44g

Thus 5 moles of Co2=
44×5=220g

Now,

1 mole of Water has 2 mole of H (2g) and 1 mole of O(16g)
So,1 mole of water=18g

And 5 moles of water=18×5=90g

Hence proved that 5 moles of Co2 is not equal to 5 moles of H2O

Hope it helps❤