Question

select the correct answer. what is the mass, in grams, of one mole of any substance known as? a. atomic mass b. molar mass c. molecular weight d. atomic number

Explanation:

• Atomic mass (A): It is the mass of an atom, usually in atomic mass units (amu), not specifically for one mole of a substance.
• Molar mass (B): By definition, molar mass is the mass (in grams) of one mole of a substance. For example, the molar mass of \(H_2O\) is \(18\space g/mol\), which means \(1\space mol\) of \(H_2O\) has a mass of \(18\space g\).
• Molecular weight (C): It is the sum of the atomic weights of all atoms in a molecule, usually in amu, not in grams per mole context for one - mole quantity.
• Atomic number (D): It represents the number of protons in an atom's nucleus and has no relation to the mass of one mole of a substance.

Answer:

B. molar mass