The data set on chemical changes consistent with the law of conservation of mass is:
The reaction of 7.5 g of hydrogen and 60 g of oxygen to produce 67.5 g of water (Option A)
Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The reactants are located on the left side while the products are located on the right side.
Reactants —> Products
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
A. Reaction of hydrogen with oxygen
Hydrogen + Oxgen = Water
7.5 + 60 = 67.5
67.5 g = 67.5 g
Since the mass of the reactants and products are the same, then the reaction supports the law of conservation of mass
B. Gasoline + oxygen = carbon dioxide + water
60.5 + 243 = 206 + 55
303.5 g ≠ 261 g
Since the mass of the reactants and products are not the same, then the reaction do not support the law of conservation of mass
From the above illustrations, the following conclusions were made:
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