Chemistry Past Questions and Answers

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone

A chemical reaction is always associated with

If a solution contains 4.9g of tetraoxosulphate (VI) acid, calculate the amount of copper (II) oxide that will react with it
[Cu = 64, O = 16, S = 32, H = 1]

What volume of gas is evolved at S.t.p if 2g of calcium trioxocarbonate (IV) is added to a solution of hydrochloric acid?
[Ca = 40, C = 12, O = 16, Cl = 35.5, H = 1 Molar volume of agas at s.t.p = 22.4 dm³