Question

to convert between moles of a reactant and moles of a product we use ____.
○ avogadros number
○ the atomic number of the elements in the substance
○ the molar mass of the substance
○ the molar ratio

Explanation:

• Avogadro's number is used to convert between moles and number of particles (atoms, molecules, etc.).
• Atomic number is related to the number of protons in an atom, not mole conversions between reactants and products.
• Molar mass is used to convert between moles and mass (grams) of a substance.
• Molar ratio (from the balanced chemical equation) is used to convert between moles of a reactant and moles of a product.

Answer:

the molar ratio