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

Give the correct formula for each of the following ionic compounds:
a. Pb₁S₁
b. Cu₁Cl₂
c. Ca₁(O₁H₁)₂
d. Ca₁O₁
e. Al₁Cl₃
f. Cu₁(N₁O₃)₁
g. Li₂(C₁O₃)₁
h. K₂S₁
i. Fe₃P₂
j. Ag₁(N₁O₃)₁

Give the correct name for each of the following ionic compounds
a. Calcium fluoride
b. Gallium hydroxide
c. Iron (III) chloride
d. Copper (II) bromide
e. Copper (I) oxide
f. Sodium sulfide
g. Barium sulfate
h. Iron (II)oxide
i. Lithium carbonate
j. Beryllium nitride

Give the correct name for each of the following covalent compounds

1. Dinitrogen monoxide
2. Sulfur trioxide
3. Oxygen Trifluoride
4. Carbon dioxide
5. Diphosphorus pentaoxide

Give the correct formula for each of the following covalent compounds

1. N₂F₆
2. C₁O₁
3. C₃F₈
4. S₂P₃
5. N₁O₂

Thermal Energy Problems

1a. 1.3E3 cals
b. exothermic, reaction (system) gave heat to the water
c. delta H is negative if the reaction is the system and delta H is positive if the system is the water.
2. 58degC