Question

(1) 12.25
The % loss in weight after heating a pure sample
of potassium chlorate (M. Wt. 122.5) will be
(1) 12.25
(2) 24.50
(3) 39.17
(4) 49.0

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Answer 1

the weight loss is of 1.5 mole of Oxygen

so % loss is (1.5×32/122.5)×100= 39.17

so answer is (3)