AP BIOLOGY

Detailed explanation-1: -Explanation: When balancing equations a coefficient can be placed to the left of a formula of a substance to make the equations balanced.

Detailed explanation-2: -To balance equations on your own, follow these simple rules: Check that all the formulae in the equation are correct. Deal with only one element at a time. Balancing is adding BIG numbers.

Detailed explanation-3: -The small number within a chemical formula is called a subscript. Why do we adjust coefficients when balancing chemical equations and not subscripts?

Detailed explanation-4: -The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products. A product is a substance that is present at the end of a chemical reaction.

Detailed explanation-5: -Step 3. Now, stoichiometric coefficients are added to molecules containing an element which has a different number of atoms in the reactant side and the product side. The coefficient must balance the number of atoms on each side. Generally, the stoichiometric coefficients are assigned to hydrogen and oxygen atoms last.