Final answer:
The mass of one mole of beryllium is 9.01 grams.
Step-by-step explanation:
The mass of one mole of beryllium, given that the atomic mass of beryllium is 9.01, is 9.01 grams. This is because one mole of any element consists of Avogadro's number, which is 6.02×1023 atoms of that substance, and by definition, the atomic mass in grams of an element is the mass of one mole of that element.
The mass of one mole of beryllium can be determined by looking at the atomic mass of beryllium on the Periodic Table. The atomic mass of beryllium is given as 9.01 amu. This means that one mole of beryllium atoms would have a mass of 9.01 grams. So the mass of one mole of beryllium is 9.01 grams.