Question

16/20
what is a coefficient?
the small number on the right of the chemical symbol.
the large number to the left of a formula.

Explanation:

In chemistry, a coefficient is the large number to the left of a formula. It indicates the number of molecules or formula units of a substance in a chemical equation. For example, in the equation \(2H_2 + O_2
ightarrow 2H_2O\), the coefficients are \(2\) (for \(H_2\)), \(1\) (for \(O_2\), since no coefficient is written it is assumed to be \(1\)) and \(2\) (for \(H_2O\)). The small number on the right of the chemical symbol is called a subscript and it indicates the number of atoms of an element in a molecule or formula unit.

Answer:

The large number to the left of a formula.