The atomic mass of calcium is 40.08. what is the mass of 6.02 × 1023 atoms of calcium?

It should be 40.08 grams...because the atomic mass is equivalent to 1 mole of atoms of an element in grams, and 6.023 × 10^23 atoms of calcium is the same as 1 mole of calcium.

Hope this helps!

The atomic mass given on the periodic table is the mass of one mole of the element (relative to the mass of 1/12 of carbon 12.) There are 6.022 x10^23 molecules of any atoms in a mole. Therefore when it asks for the mass of 6.02 x 10^23 atoms it's asking what is the mass of one mole of Calcium.

The answer, therefore, is 40.08 as it states the atomic mass of calcium is 40.08