Question

Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the reaction?

Answer 1

The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.

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Answer 2

Answer: A: The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.

Explanation: The chemical reaction of photosynthesis is represented as:

$C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O$

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products is equal to the mass of reactants.

Thus the number of atoms of each element must be same on both sides of the chemical equation. Thus the equation is balanced and there are 6 atoms of carbon in reactants as well as  products.