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Question

When 10 g of KHCO3 is heated, 6.31 g of K2CO3 and 1.07 g of H2O are produced. How many grams of CO2 will be produced?

A
2.14 g
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B
1.07 g
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C
2.62 g
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D
1.14 g
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Solution

The correct option is C 2.62 g
Applying the law of conservation of mass,
total mass of the reactants is equal to the total mass of the products.
Mass of KHCO3 = mass of K2CO3 + mass of CO2 + mass of H2O
Total mass of KHCO3 heated = 10 g
Total mass K2CO3 produced = 6.31 g
Total mass of H2O produced = 1.07 g
Mass of CO2 produced=(106.311.07)=2.62 g

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