Question

How much mass of Sulphur dioxide gas will be produced when 16 gram of sulphur is burnt in 100 gram of oxygen?​

Answer 1

Answer:

Explanation:

(Average atomic mass: S = 32 u,

O = 16 u)

mulus Mall

(Ans. 32 g)

Answer 2

Answer:

Explanation:

The reaction for burning of sulphur is,  

 

space space straight S space space space space space space plus space space space straight O subscript 2 space space space rightwards arrow space space space SO subscript 2 space

1 mol space space space space space space space 1 mol space space space space space space space space 1 mol

 

We know,  

S = 32, K = 39 , N = 14, O = 16

Moles of S reacted =

16 over 32 equals space 0.5 space mol

0.5 mol of S needs 0.5 mol of Oxygen,

To create confusion, x cc is mentioned in the question, which has no significant use.

So we know that Sulphur burns in 0.5 mol Oxygen.

The thermal decomposition of Potassium nitrate :

space space space 2 KNO subscript 3 space space rightwards arrow space space 2 KNO space space plus space space straight O subscript 2 space

space space space space 2 mol space space space space space space space space space space space space space space space space space space space space space space space space space 1 space mol space space

​ left square bracket 2 space straight x space 101 straight g right square bracket space space space space space space space space space space space space space space space space space space space space 32 space straight g space

2 mols of KNO3 gives 1 mol of O2  

0.5 mol of O2 will be produced by 1 mol of KNO3

1mol of KNO3 = 101 g

Therefore the amount of  KNO3 required to produce oxygen is 101 g.