Pl help m i promise i will mark you brainiest pl A)The exhaust fumes from the internal combustion engines of motor vehicles contribute to the poor quality of air in many cities. The exhaust fumes contain atmospheric pollutants such as nitric oxide, NO, and carbon monoxide, CO.

(a) Nitric oxide, NO, is formed when oxygen and nitrogen from the air react in an internal combustion engine.

(i) Construct a balanced equation for this reaction.



(b) Nitric oxide and carbon monoxide in the exhaust gases react together in the catalytic converter of a motor vehicle.

(i) Write a balanced equation for this reaction.



(c) Nickel is a transition element. It is manufactured in a four-stage process from nickel(II) sulphide, NiS.

• Stage 1 – nickel(II) sulphide is heated in air to form nickel(II) oxide and sulphur dioxide.

(i) Construct the balanced equation for the reaction in stage 1.

(d) A copper compound contains 21.09% copper, 43.82% caesium and 35.09% chlorine by mass. Use this information to deduce the empirical formula of this copper compound.

empirical formula [2]