butanoic acid contains only carbon ,hydrogen and oxygen atoms. A 4.24g sample of the acid is completely burnt, and gives 8.45g of carbon (iv) oxide and 3.46g of water. If it has a molecular mass of 88,determine its molecular formula. Show working​

Reacting masses1 calcium carbonate breaks down on heating to produce calcium oxide and carbondioxide gas.caco3 + cao + co2a student heats 15 g of calcium carbonate strongly in a crucible.relative atomic masses (a): ca = 40, c = 12, o = 16.calculate the mass of calcium oxide produced by this reaction.(5 marks)