Neco 2019 Chemistry Question 11
Practice objective / multiple choice question 11 from the 2019 Neco Chemistry examination.
A 3.00 g mixture of \( \text{CaCO}_3 \) and \( \text{Na}_2\text{CO}_3 \) is heated strongly so that each carbonate decomposes to its oxide and carbon dioxide: \( \text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2 \) \( \text{Na}_2\text{CO}_3 \rightarrow \text{Na}_2\text{O} + \text{CO}_2 \) The total mass of the oxide residues obtained is 1.70 g. Determine the mass percent of \( \text{CaCO}_3 \) in the original mixture.
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About This Question
This is Neco 2019 Chemistry Question 11. It is one of the objective questions from the 2019 Neco Chemistry examination.
Difficulty level: Medium .
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