Question

X Grams of CaCO3 was completely burnt in air.The weight of solid residue is 28g then the value of X​

Answer 1

Answer:

the answer is x = 50g I think the following explanation will be useful

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Answer 2

Answer:

50g calcium carbonate

Explanation:

100 g.CaCO3 give 56g Cao

But here only give 28g

So CaCO3 is 50g

Remember that after combustion of CaCO3 produce Cao and Co2

Cao is the solid residue

I hope it helps you