During an investigation a scientist heated 2.76 g of silver carbonate till it decomposed to leave a silver residue. The total mass of the silver residue formed was 2.16 g. Does the law of conservation of mass hold true in this case? Use complete sentences to justify your answer based on numerical calculations.

1 answer

To determine if the law of conservation of mass holds true in this case, we can compare the initial mass of silver carbonate to the total mass of the silver residue formed.

The initial mass of the silver carbonate is 2.76 g.

The total mass of the silver residue formed is 2.16 g.

If the law of conservation of mass holds true, the mass of the reactants (silver carbonate) should be equal to the mass of the products (silver residue). However, in this case, the mass of the silver residue is less than the initial mass of the silver carbonate.

Therefore, based on the numerical calculations, the law of conservation of mass does not hold true in this case. There is a loss of mass during the decomposition of silver carbonate, indicating that a substance(s) may have been lost during the reaction.