Question

U. What weight of calcium oxide will be
formed on heating 19.3 g of calcium
carbonate ?
(At. wt. : Ca=40; C = 12; 0 = 16)
(Ans. : 10.8 g)​

Answer 1

Answer:

10.80 gram.

Explanation:

We get the gram molecular mass of the calcium carbonate as 40+12+3*16 which on calculating will be 100 gram. The molecular mass of calcium oxide will be 40+16=56 gram and the molecular mass of the carbon dioxide is 44 gram.

Since, we know that the equation of calcium carbonate when heated is given as:- CaCO3 -> CaO + CO2. Where the weights are 100 56 and 44 grams respectively. Thus, 100 gram of calcium carbonate gives 56 gram of calcium oxide so 1 gram will give 56/100 gram of calcium oxide. Hence, 19.3 gram of calcium carbonate will yield 56/100*19.3 = 10.8 gram of calcium oxide.

Answer 2

Explanation:

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