Answer:
1. 1 mole
2. 2 moles
3. 2.49x10^–4 mole
4. 564.78 moles
5. 1.25x10^–4 mole
Explanation:
From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02x10^23 molecules. With this is mind, we answer the questions given above as follow:
1. 6.02x10^23 molecules = 1 mole
2. 6.02x10^23 molecules = 1 mole
Therefore, 1.204x10^24 molecules = 1.204x10^24/6.02x10^23 = 2 moles
3. 6.02x10^23 molecules = 1 mole
Therefore, 1.5x10^20 molecules = 1.5x10^20/6.02x10^23 = 2.49x10^–4 mole
4. 6.02x10^23 molecules = 1 mole
Therefore, 3.4x10^26 molecules = 3.4x10^26/6.02x10^23 = 564.78 moles
5. 6.02x10^23 molecules = 1 mole
Therefore, 7.5x10^19 molecules = 7.5x10^19/6.02x10^23 = 1.25x10^–4 mole
