10-8. Convert into moles:G) 12 g of oxygen gasb) 20 g of water22 8 of

1.	10-8. Convert into moles:G) 12 g of oxygen gasb) 20 g of water22 8 of carbon dioxide
Answer» Molar mass ofO2= 2 x 16 = 32 g Number of moles in12g O2= Given mass/ Molar mass = 12/32 = 0.375 mole (b) Molar mass ofH2O = 2 x 1 + 16 = 18g Number of moles in20 g H2O = 20/18 = 1.11mole (c) Molar mass ofCO2= 12 + 16 x 2 = 12 + 32 = 44g Number of moles in22g CO2= 22/44 = 0.5mole

10-8. Convert into moles:G) 12 g of oxygen gasb) 20 g of water22 8 of carbon dioxide

Answer»

Molar mass ofO2= 2 x 16 = 32 g

Number of moles in12g O2= Given mass/ Molar mass = 12/32 = 0.375 mole

(b) Molar mass ofH2O = 2 x 1 + 16 = 18g

Number of moles in20 g H2O = 20/18 = 1.11mole

Number of moles in22g CO2= 22/44 = 0.5mole