Question

In a chemical equation,the number of molecules of a given substance is indicated by a _____?​

Answer 1

Step-by-step explanation:

Coefficient.....here is an example of formula for burning methane:

CH4 to produce CO2 and water .....there is two molecules of O2 used and two water molecules produced

CH
`_(4)` + 2O
`_(2)` ===> CO
`_(2)` + 2 H
`_(2)`O

(Note that the atoms in each molecule are indicated by a SUBSCRIPT .)