Concept explainers
Interpretation:
The combined mass of the component of elements after heating needs to be determined.
Concept introduction:
According to law of conservation of mass, total mass of reactant and product in a

Answer to Problem 53A
68 g.
Explanation of Solution
The mass of the substance is 68 g.
Now, as per the law of conservation of mass if reactants form products, the mass of reactants initially present will be equal to the sum of masses of products formed.
According to the given reaction, a substance breaks down into component elements thus, mass of substance will be equal to the sum of the masses of the component elements.
Therefore, the combined mass of the elements will be 68 g.
Chapter 3 Solutions
Chemistry: Matter and Change
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