Chapter 5 2019/2020

a) When coal is burnt, the sulphur present in coal is converted to sulphur dioxide which is responsible for the acid rain phenomenon.

S(s) + O2(g) → SO2 (g)

If 2.54 kg of sulphur is reacted with oxygen, determine the volume of sulphur dioxide gas formed at 30.5 oC and 851.2 mmHg. 

[5 Marks]      

b) In an experiment, NH3 gas was produced and collected using water displacement method. At 24 oC and atmospheric pressure of 762 mmHg, the volume of the gas collected was 128 mL. Calculate the mass of the gas obtained. 

[Given the vapour pressure of water = 22.4 mmHg]  

[6 Marks]