(a(i))[1]
Calculate the mass of zinc that was used in the experiment.
(a(ii))[1]
Calculate the mass of zinc oxide made.
(a(iii))[1]
Using your answers to (i) and (ii), calculate the mass of oxygen that combines with the zinc.
(a(iv))[2]
Using your answers to (i) and (iii), calculate the formula of zinc oxide. Show every step of your working. [$A_r$: Zn, 65; O, 16]
(b)[2]
When zinc reacts with dilute hydrochloric acid, a gas is released. Name the gas. Give a test and observation to identify the gas.