The chemical formula for beryllium sulfide is BeS. A chemist measured the amount of beryllium sulfide produced during an experiment. She finds that 8.31 g of beryllium sulfide is produced. Calculate the number of moles of beryllium sulfide produced. Be sure your answer has the correct number of significant digits

The answer is 0.20231 mol BeS

Explanation:

we look for the molecular weight of beryllium and sulfur in the periodic table:

molecular weight of Be = 9.01 g/mol

molecular weight of S = 32.065 g/mol

therefore, the molecular weight of beryllium sulfide is equal to:

molecular weight of BeS = 9.01 + 32.065 = 41.075 g/mol

The number of moles will be equal to:

"the periodic table is arranged in order of atomic number."