What is the purpose of coefficients when balancing an equation?

Coefficients required to balance a chemical equation.

Explanation:

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answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.