Question

convert into mole a. 12 gram of Oxygen gas b.20, pocket C. 22 gram of carbon dioxide and what is the concept of mole please explain

Answer 1

(a) Molar mass of O2 = 2 x 16 = 32 g
Number of moles in 12g O2 = Given mass/ Molar mass = 12/32 = 0.375 mole

 
(b) Molar mass of H2O = 2 x 1 + 16 = 18g
Number of moles in 20 g H2O = 20/18 = 1.11mole
 
(c) Molar mass of CO2 = 12 + 16 x 2 = 12 + 32 = 44g
Number of moles in 22g CO2 = 22/44 = 0.5mole