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Mole practice

SI session 2-11
Moles and Molecular Weight
Part A:
Calculate the molecular weight of each of these molecules:
1. CO2
3. C6H12O6
2. NH3
4. Al2(SO4)3
Part B:
Mole Practice:
1. How many moles are in 6.2 grams of elemental helium (He2)?
2. Based on the answer from question 1, how many atoms are in the same sample?
3. What is the weight in grams of a 0.0512 mole sample of glucose (C6H12O6)?
4. How many carbon atoms are there in the same solution from question 3?