Answer To Mid-Year Exam Review Problems

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1. 2,3,3,3,4,5,2,5,2,6
2. 3.42E-4kg, 5.02E-2km, 5.002E2cm, 2.350E3g, 1.02E1 m³, 2E6 years
3. 3,090,000,000g , 20,000cm, 0.555L, 0.0002443km, 1020mL, 48g/mL

Calculate the molar mass of each of the following:

1. 46g C₂H₅O₁H₁/ 1mole C₂H₅O₁H₁

2. 1116g Ca₁Cl₂/ 1mole Ca₁Cl₂

3. 106g Na₂C₁O₃/ 1mole Na₂C₁O₃

4. 52g C₁H₂F₂/ 1mole C₁H₂F₂

5. 41g Li₁(O₁H₁)₂/ 1mole Li₁(O₁H₁)₂

6. 331g Pb₁(N₁O₃)₂/ 1mole Pb₁(N₁O₃)₂

7. 148g Na₁Cl₁

8. 20.mole H₂O₁

9. 2.759 mole C₄H₁₀

10. 3.76E24 molecules H₂O₁

11. 190 L He @ STP