Question

When 8.4 grams of a compound 'A' is added to a solution of an acid 'B' weighing 10grams, it is observed that 2.5 grams of a gas 'C' is released and a residue 'D' is left behind.
What is the mass of residue 'D' formed in this reaction, if the law of conservation of mass is
true?
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Answer 1

Answer:

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