The mass of exactly 1 mole of each of the specified elements can be determined using their atomic weights found on the periodic table, which are expressed in grams per mole (g/mol).
- a) Rubidium (Rb):
The atomic weight of rubidium is approximately 85.47 g/mol. This means that 1 mole of rubidium has a mass of 85.47 grams. - b) Boron (B):
The atomic weight of boron is about 10.81 g/mol. Therefore, 1 mole of boron weighs 10.81 grams. - c) Krypton (Kr):
The atomic weight of krypton is approximately 83.80 g/mol. Thus, 1 mole of krypton has a mass of 83.80 grams.
In summary, the mass of 1 mole of each element is as follows:
- Rubidium: 85.47 grams
- Boron: 10.81 grams
- Krypton: 83.80 grams