Question

How many moles andmolecules are present in 2.2g of carbon dioxide

Answer 1

1 mol CO₂ = 12 + (16x2) =12 + 32 = 44 g

2.2 g CO₂ = 2.2/44 = 0.05 Moles

1 mol = 6.023 x 10^-23 molecules so 0.05 mol = 3.01 x 10^-24molecules.