1. EOC Chemistry Review II

2. Which is an empirical formula? A. C 2 H 2 B. H 2 0 C. H 2 O 2 D. C 6 H 12 O 6

3. What is the % by mass of oxygen in sulfuric acid? A. l6% B. 33% c.65% d.98%

4. The temperature of a 2.0 liter sample helium gas at STP is increased to 27 o C and the pressure is decreased to 80kPa. What is the new volume of the helium sample? a.1.4L b.2.0L c.2.8L d.4.0

5. 3 flasks of nitrogen, oxygen, and bromine gas each having a pressure of 2 atms. They are all put into one container. What would be the total pressure of the one final container.

6. How many grams of sulfuric acid are needed to produce exactly 11.2 liters of hydrogen measured STP? Mg + H 2 SO 4 MgSO 4 + H 2 a.24.5 g b.49.0 g c.98l.0 g d.196 g

7. What is the total number of liters of oxygen required to produce 40 liters of nitrous oxide? 4NH 3 + 5O 2 4NO + 6H 2 0 a.5L b.9L c.32L d.50L

8. What is the concentration of a solution of 10moles of copper II nitrate in 5 liters of solution? a..50 M b.2.0 M c.5.0 M d.10. M

9. A 20 ml sample of.6 M HCl is diluted with water to a volume 40ml. What is the new concentration? a..15M b..60 M c..30 M d.1.2 M

10. What is the pH of a solution that has a hydrogen ion concentration of 1 x 10 -10 M? a.1 b.10 c.14 d.4

11. What is the hydroxide ion concentration of a solution with a pH 4 ? A. 1 x 10 -4 B. 1 x 10 -7 C. 1 x 10 -10 D. 1 x 10 -14

12. The temperature of 100g of water changes from 16. o C to 20. o C. What is the total number of joules of heat energy absorbed by the water? A. 105 B. 168 C. 420 D. 1672

13. Label the graph for the forward reaction Activation energy E Enthalpy or Heat of Reaction H

14. Which conditions will increase the rate of a chemical reaction? a.Decreased temperature and decreased concentration of reactants. b.Decreased temperature and increased concentration of reactants c.Increase temperature and increased concentration of reactants

15. A catalyst can increase the rate of a reaction by a.Decreasing the activation energy b.Increasing the activation energy c.Increasing the potential energy

16. 4HCl + MnO 2 MnCl 2 + 2H 2 O + Cl 2 a.Manganese is reduced it changes from +4 to +2 b.Manganese is oxidized it changes from +4 to +2 c.Manganese is reduced it changes from +2 to +4

17. The half – life of carbon 14/6 is 5,730 years. What fraction of a 1 gram sample would remain after 17,190 years? A ½ B ¼ C 1/8 D 1/16

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