Final answer:
To determine the number of moles of beryllium in 1.00 g, divide the mass of beryllium by its molar mass.
Step-by-step explanation:
To determine the number of moles of beryllium in 1.00 g, we need to use the molar mass of beryllium. The molar mass of beryllium is 9.01 g/mol. We can use this information in the following way:
moles of beryllium = mass of beryllium / molar mass of beryllium
moles of beryllium = 1.00 g / 9.01 g/mol
moles of beryllium ≈ 0.111 moles