Question

1. choose the best answer.

mole ratios are obtained from the ____ in a balanced chemical equation.
molar masses
chemical symbols
coefficients
subscripts

1. choose the best answer.

the unit mole (mol) is used to express the ____.
volume of gases
amount of particles
heat energy
atomic masses

Explanation:

1. For mole ratios in a balanced chemical equation, the numerical coefficients in front of chemical formulas represent the relative number of moles of each substance, so they are used to find mole ratios.
2. The mole (mol) is the SI unit for measuring the amount of a substance, which corresponds to the amount of particles (atoms, molecules, ions, etc.).

Answer:

1. coefficients
2. amount of particles