Question

The [right/front/equation/coefficient] is the number in [right/front/equation/coefficient] of the element or compound.

Answer 1

The **coefficient** is the number in **front** of the element or compound. Coefficients are used in chemical equations to indicate the number of molecules or moles of a substance involved in a reaction. For example, in the equation \(2H_2 + O_2 \rightarrow 2H_2O\), the coefficient "2" in front of \(H_2\) and \(H_2O\) indicates there are two molecules of hydrogen and two molecules of water.