Self Quiz 

List of atomic weights:

N = 14.0 g/mole   O = 16.0 g/mole    S = 32.1 g/mole    

Cl = 35.5 g/mole   Cr = 52.0 g/mole

1. What is the formula weight (molecular weight) for NO₂?

2. A compound has the molecular formula N₂O₄. What is its empirical formula?

3. Write the formula for a molecule which has two nitrogen atoms and five oxygen atoms.

4. A compound contains .328 g Cr and .672 g Cl. What is its empirical formula?

5. A compound with an empirical formula of CH₂ has a molecular weight of 56. What is its molecular formula?

6. What is the relationship between a mole of an element and the atomic weight of the element?

7. How many moles are there in 8.00 g of SO₂?

8. Calculate the percent composition by weight of SO₂.

9. What is the weight in grams of .60 moles of S?

10. State the basic points of Dalton's theory.

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