Mass of CaO will be required to remove the hardness of 1000 litres of water containing 1.62 g of calcium bicarbonate per litre is A. Find value of A

Calculate the mass of CaO required to remove the hardness of 1000,000 litres of water containing 1.62 g of calcium bicarbonate per litre.

Calculate the mass of CaO required to remove the hardness of 10^(6) litre of water containing 1.62 g of calcium bicarbonate per litre.

Calculate the amount of lime Ca(OH)_2 required to remove the hardness of 60,000 litres of well water containing 16.2 g of calcium bicarbonate per hundred litre. (Atomic masses Ca = 40, C = 12, O = 16, H = 1)

What is the amount of lime Ca(OH) 2 ​ required to remove the hardness in 60 litres of pond water containing 1.62 mg of calcium bicarbonate per 100 mL of water?