Calculate the mass of solid which will be precipitated when 35g of carbon(iv)oxide are passed through a solution of calcium hydroxide

Answer 1

Ca(OH)2 + CO2 ==> CaCO3 + H2O

mols CO2 = grams/molar mass = ?
ASSUMING you have enough Ca(OH)2 to use all of the CO2, then
mols Ca(OH)2 = mols CO2 (look and see in the balanced equation that 1 mole Ca(OH)2 requires 1 mol CO2 and ppts 1 mol CaCO3.
Then convert mols CaCO3 to grams.
grams = mols x molar mass = ?
Post your work if you get stuck.

Answer 2

Calculate the grammes of oxygen which would be evolve on heating 5g of potassium trioxochlorate (v)

Answer 3

kindly how the workings

Answer 4

I can't understand anything,kindly show the workings