Q: What are used to balance chemical equations?


Read this paragraph and choose the correct option from the provided answers:

Coefficients are used to balance chemical equations. A coefficient is a number placed in front of a chemical symbol or formula. It shows how many atoms or molecules of the substance are involved in the reaction. For example, two molecules of hydrogen would be written as 2H 2 . A coefficient of 1 usually isn’t written.

 Choices:

- velocities

- densities

- fractions

- coefficients


A:
coefficients