SAT Chemistry Online Practice Test 5: Part B

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Question 23 questions

Time 16 minutes

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1.

In this graphic representation of a chemical reaction, which arrow depicts the activation energy of the forward reaction?

A. A
B. B
C. C
D. D
E. E

2. How many liters (STP) of O2 can be produced by completely decomposing 2.00 moles of KClO3?

A. 11.2
B. 22.4
C. 33.6
D. 44.8
E. 67.2

3. Which of the following statements is true?

A. A catalyst cannot lower the activation energy.
B. A catalyst can lower the activation energy.
C. A catalyst affects only the activation energy of the forward reaction.
D. A catalyst affects only the activation energy of the reverse reaction.
E. A catalyst is permanently changed after the activation energy is reached.

4. Which of the following is the correct structural representation of sodium?

A. Nucleus and electron configuration:

1s2 2s2 2p6 3s2 3p6 4s2 4p3
B. Nucleus and electron configuration:

1s2 2s2 2p6 3s2 3p6 4s2 3d1 4p2
C. Nucleus and electron configuration:

1s2 2s2 2p6 3s1
D. Nucleus and electron configuration:

1s2 2s2 2p6 3s2 3p6 3d3 4s2
E. Nucleus and electron configuration:

1s2 2s2 2p6 3s1

5. If the molecular mass of NH3 is 17, what is the density of this compound at STP?

A. 0.25 g/L
B. 0.76 g/L
C. 1.52 g/L
D. 3.04 g/L
E. 9.11 g/L

6. Which bond(s) is (are) ionic?

I. H-Cl(g)

II. S-Cl(g)

III. Cs-F(s)

A. I only
B. III only
C. I and II only
D. II and III only
E. I, II, and III

7. Aromatic hydrocarbons are represented by which of the following?







A. I only
B. III only
C. I and II only
D. II and III only
E. I, II, and III

8. According to placement in the Periodic Table, which statement(s) regarding the first ionization energies of certain elements should be true?

I. Li has a higher value than Na.

II. K has a higher value than Cs.

III. Na has a higher value than Al.

A. I only
B. III only
C. I and II only
D. II and III only
E. I, II, and III

9. Correctly expressed half-reactions include which of the following?

I. CrO42- + 8H+ + 6e- → Cr3+ + 4H2O

II. I- + 6OH- → IO3- + 3H2O + 6e-

III. MnO4- + 2H2O + 3e- → MnO2 + 4OH-

A. I only
B. III only
C. I and II only
D. II and III only
E. I, II, and III

10. What is the apparent oxidation state (number) of the underlined element in the compound

KHCO3?

A. +1
B. +2
C. +3
D. +4
E. +5

11. What is the apparent oxidation state (number) of the underlined element in the compound

MgSO4?

A. +1
B. -1
C. +2
D. -2
E. +3

12. What is the apparent oxidation state (number) of the underlined element in the compound

CO2?

A. +2
B. -2
C. +4
D. -4
E. +5

13. An atom with an electron configuration of 1s2 2s2 2p6 3s2 3p4 will probably exhibit which oxidation state?

A. +2
B. -2
C. +3
D. -3
E. +5

14. In the Lewis dot structure X:, what is the predictable oxidation number?

A. +1
B. -1
C. +2
D. -2
E. +3

15. Commonly used in the laboratory to transfer an exact volume of liquid from one container to another

A. Balance
B. Barometer
C. Condenser
D. Funnel
E. Pipette

16. Commonly used in the laboratory in a distillation setup

A. Balance
B. Barometer
C. Condenser
D. Funnel
E. Pipette

17. Commonly used in the laboratory in a filtration setup

A. Balance
B. Barometer
C. Condenser
D. Funnel
E. Pipette

18. If you collected hydrogen gas by the displacement of water and under the conditions shown:

which of the following would give you the pressure of the hydrogen in the bottle?

A. 730. mm - 40.8 mm
B. 730. mm - 30.0 mm
C. 730. mm - 30.0 mm/13.6 + 40.8 mm
D. 730. mm - 30.0 mm/13.6 - 40.8 mm
E. 730. mm - 40.8 mm/13.6 - 30.0 mm

19. What occurs when a reaction is at equilibrium and more reactant is added to the container?

A. The equilibrium remains unchanged.
B. The forward reaction rate increases.
C. The reverse reaction rate increases.
D. The forward reaction rate decreases.
E. The reverse reaction rate decreases.

20. How much heat energy is released when 8 grams of hydrogen are burned? The thermal equation is 2H2(g) + O2(g) → 2H2O(g) + 483.6 kJ.

A. 241.8 kJ
B. 483.6 kJ
C. 967.2 kJ
D. 1,934 kJ
E. 3,869 kJ

21. Would a spontaneous reaction occur between zinc ions and gold atoms?

Zn2+ + 2e- → Zn0 E0 = -0.76 volt
Au3+ + 3e- → Au0 E0 = +1.42 volts

A. yes-Reaction potential 2.18 V
B. no-Reaction potential -2.18 V
C. yes-Reaction potential 0.66 V
D. no-Reaction potential -0.66 V
E. yes-Reaction potential 0.56 V

22. Four moles of electrons (4 × 6.02 × 1023 electrons) would electroplate how many grams of silver from a silver nitrate solution?

A. 108
B. 216
C. 324
D. 432
E. 540

23. A 5.0 M solution of HCl has how many moles of H+ ion in 1 liter?

A. 0.50
B. 1.0
C. 2.0
D. 2.5
E. 5.0