Question

The molar mass of phosphorus is equal to the mass of 6.02 x 1023 atoms of phosphorus. What is the molar mass of phosphorus, in g/mol?
5.14
30.97
45.97
90.33

Answer 1

If we look at the periodic table, we see that phosphorous has an atomic mass of 30.97. Therefore, it has a molar mass of 30.97 g/mol. The answer is B.