Which of the following best describes the mass of 1 mol of atoms for an element?

• A. It is the atomic number of the element in grams.
• B. It is always 1 gram for any element.
• C. It is equal to the element's molar mass in grams.
• D. It is equal to Avogadro's number in grams.

Answer: (C)

Verified step by step guidance

1. Understand that 1 mole of atoms of any element contains Avogadro's number of atoms, which is approximately \$6.022 \times 10^{23}$ atoms.
2. Recall that the atomic mass of an element (given in atomic mass units, amu) represents the mass of a single atom relative to carbon-12.
3. Recognize that the molar mass of an element is the mass of 1 mole of its atoms expressed in grams, numerically equal to the atomic mass in amu.
4. Therefore, the mass of 1 mole of atoms of an element is equal to its molar mass in grams, not the atomic number or Avogadro's number in grams.
5. Conclude that the correct description is: 'It is equal to the element's molar mass in grams.'