Question

Chlorine, nitrogen, ammonia and sulphur dioxide gases are collected under the same conditions of temperature and pressure.
Copy the following table which gives the volumes of the gases collected, and the number of molecules (X) in 20L of nitrogen.You are to complete the table by giving the number of molecules in th e other gases, in terms of X.

Gas	Volume(litres)	Number of molecules
Chlorine	10
Nitrogen	20	X
Ammonia	20
Sulphur dioxide	5

Answer 1

(a) If 20L of nitrogen has = X number of molecules
Then, 10L of chlorine will have = X x 10/20 = X/2.

(b) If 20L of nitrogen has = X number of molecules
Then, 20L of ammonia will have = X x 20/20 = X.

(c) If 20L of nitrogen has = X number of molecules
Then, 5L of sulphur dioxide will have = X x 5/20 = X/4.

Gas	Volume(litres)	Number of molecules
Chlorine	10	X/2
Nitrogen	20	X
Ammonia	20	X
Sulphur dioxide	5	X/4