How many water molecules are there for every one Na2SO4?

The movement of tectonic plates and in two locations is described below: location a: tectonic played push together location b: tectonic plates push apart

Give one example of a pure (exact) number and of an estimated (measured) number.

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)