Question

On heating 2.45g of $KClO_{3}$, it shows a weight loss of 0.192g. What percentage of $KClO_{3}$ has decomposed?
1) 83.6% 2) 75% 3) 41.8% 4) 20%

Answer 1

KClO3 =19+17+(24*3)=(find)
Where bycalculating atomic weight and atomic mass the answer is 75%