An organic compound on analysis was found tocontain 0.032% of Sulphur

1.	An organic compound on analysis was found tocontain 0.032% of Sulphur by mass. Themolecular mass of the compound, if its onemolecule contains two sulphur atoms, is(A) 100000 u(C) 20000u(B) 10000 u(D) 200000 u
Answer» Let the molecular mass of compound be 'X'. Atomic mass of sulphur- 32gatomic mass of 2 sulphur atoms= (322)g since 0.032 % sulphur is present in the given compound, percentage of sulphur total molecular weight of compound = weight of sulphur in compound.0.032 % of X = 322 (0.032 / 100) X = 64 X = (64 * 100)/ 0.032X = 2 * 10^5 g The molecular weight of the 200000 u (D) is correct option

An organic compound on analysis was found tocontain 0.032% of Sulphur by mass. Themolecular mass of the compound, if its onemolecule contains two sulphur atoms, is(A) 100000 u(C) 20000u(B) 10000 u(D) 200000 u

Answer»

Let the molecular mass of compound be 'X'.

Atomic mass of sulphur- 32gatomic mass of 2 sulphur atoms= (32*2)g

since 0.032 % sulphur is present in the given compound,

percentage of sulphur * total molecular weight of compound = weight of sulphur in compound.0.032 % of X = 32*2

(0.032 / 100) * X = 64 X = (64 * 100)/ 0.032X = 2 * 10^5 g

The molecular weight of the 200000 u

(D) is correct option