10 mL of a 1.0 solution is diluted to 100 mL. Then 10 mL of the diluted solution is removed and diluted again to 100 mL. What is the concentration of the second dilution?

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)