Question

what is the molar mass of calcium? 40.078 g/mol 63.546 g/mol 24.022 g/mol 12.011 g/mol

Explanation:

The molar mass of an element is numerically equal to its atomic mass (in atomic mass units) and is expressed in grams per mole. From the periodic table, the atomic mass of calcium (Ca) is approximately 40.078 atomic mass units, so its molar mass is 40.078 g/mol. The other options correspond to different elements: 63.546 g/mol is for copper, 24.022 g/mol is for magnesium, and 12.011 g/mol is for carbon.

Answer:

A. 40.078 g/mol