Chemistry Past Questions and Answers

Dissolving some pellets of NaOH in water would result in

Calculate the number of moles of HCl present in 20cm³ of a 0.75M solution of the acid

The oxidation state of oxygen in tetraoxosulphate (VI) acid is

MnO_2(s) + xHCl_(aq) → MnCl_2(aq) + yH₂O_(l) + zCl_2(g)
In theequation above, what are the values of x, y and z respectively

Calculate the mass of chlorine gas which occupies a volume of 1.12dm³ at s.t.p
[Cl = 35.5, molar volume of gas at s.t.p = 22.4 dm³