Question

Deduce the number of molecules in 8.8 g of carbon dioxide

Answer 1

Best and valid and short fornmula for calculation of moolecuels is

Mole × avagadro no.

8.8/44×6.022×10^23

Answer 2

Gram molecular weight  of  CO2 = 12+16*2 =44 g

44 g of carbon dioxide contains = 1 molecule

∴ 8.8 g of CO2 contains = 1/44×8.8 = 0.2 molecules