(a(i))[1]
The reaction is exothermic. What is meant by the term exothermic?
(a(ii))[1]
Which word most suitably describes $\text{Mg(NO}_3)_2$? acid, base, oxide or salt.
(a(iii))[1]
Oxides of nitrogen are made when fossil fuels burn. What type of chemical reaction takes place when fossil fuels are burned?
(a(iv))[1]
Oxides of nitrogen dissolve in rain water and produce acid rain. State one harmful effect of acid rain on buildings.
(b(i))[3]
Describe a practical method for investigating how fast this reaction occurs.
(b(ii))[2]
What effect would each of the following have on the rate of this reaction? • Larger pieces of magnesium are used instead of magnesium powder. All other conditions stay the same. • The temperature of the reaction mixture is increased. All other conditions stay the same.