what is the atomic mass of beryllium
A mole is defined as the amount of a substance whose mass in grams equals the atomic, molecular, or formula-unit mass in atomic mass units. Example 1: Water (H2O) has two hydrogen atoms and one oxygen atom per molecule. The two hydrogen atoms each have an atomic mass of 1.008, the oxygen atom has an atomic mass of 15.999, the sum for all three atoms is 18.015. So a mole of water molecules has a mass of 18.015 g. Example 2: Beryllium has an aromuc mass of 9.01. So a mole of beryllium atoms has a mass of 9.01 g.