Question

Number of moles of any chemical substance is given by the ratio of given mass to _____.

• A. Avagadro's number
• B. atomic mass
• C. molar mass
• D. atomic number

Answer 1

The correct option is C molar mass

• Molar mass means the mass of one mole of the substance.
• In other words, it gives the number of grams per mole of a compound.
• Hence, number of moles is the ratio of given mass by molar mass.