(1/2)Zn²⁺_(aq) + e^- → (1/2) Zn_(s)
In the reaction above, calculate the quantity of electricity required to discharge zinc.
[F = 96 500 C mol^-1]

Given that M is the mass of substance deposited in an electrolysis and Q the quantity of electricity consumed, then Faraday's law can be written as

0.46g of ethanol when burned raised the temperature of 50g of water by 14.3K. Calculate the heat of combustion of ethanol.
[C = 12, O = 16, H = 1, Specific heat capacity of water = 4.2 jg^-1K^-1]

Powdered marble reacts faster with hydrochloric acid solution than the granular form because the powdered form has

N_2(g) + O_2(g) ↔ 2NO_(g); ΔH = + 180.6 kJ mol^-1
In the reaction above, increase in temperature will