FUTA Che 101

Basic General Chemistry I

Course Synopsis

Atoms, atomic structures, atomic theory, aufbau method, Hund’s rule, Pauli Exclusion principles, atomic spectra, molecules and chemical reaction, energetics, chemical equation and stoichiometry, atomic Structure and; Modern electronic theory of atoms; Radioactivity; Chemical kinetics, collision theory, Kinetic theory of gases, solution, solubility and solubility product. Electro chemistry, electrode potential, half-cell equation.

 

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CHE 101

This is just a practice to test how ready you are. They are coined from past questions.

25 questions

10 minutes

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1. Carbon-12 atom has_______________.

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2. Suppose the activation energy of a certain reaction is 250 kJ/mol. If the rate constant at T1 = 300 K is k1 and the rate constant at T2 = 320 K is k2, then the reaction is __ times faster at 320 K than at 300 K. (Hint: Solve for k2/k1.)

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3. How many p electrons are there in an atom of rubidium?

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4. The maximum number of electrons that can be accommodated in a sublevel for which l = 3 is:

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5. Quantum numbers are

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6. The speed of a chemical reaction

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7. Rate at which reaction proceeds is directly related to

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8. Which of the air pressures is appropriate for the production of cathode rays in the discharge tube?

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9. Consider the species ⁷²Zn, ⁷⁵As and ⁷⁴Ge.
These species have:

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10. A correct reaction mechanism for a given reaction usually is:

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11. What is the activation energy (in kJ) of a reaction whose rate constant increases by a factor of 100 upon increasing the temperature from 300 K to 360 K?

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12. At equilibrium, a 1.0 liter container was found to contain 0.20 moles of A, 0.20 moles of B, 0.40 moles of C and 0.40 mole of D. If 0.10 moles of A and 0.10 moles of B are added to
this system, what will be the new equilibrium concentration of A?
A(g) + B(g)------> C(g) + D(g)
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13. Consider the reversible reaction at equilibrium at 392oC: 2A(g) + B(g) ------>C(g) The partial

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pressures are found to be: A: 6.70 atm, B: 10.1 atm, C: 3.60 atm. Evaluate Kp for this reaction.

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14. What is the molarity of phosphoric acid in a solution labeled 20.0% phosphoric acid
(H3PO4) by weight with a density = 1.12g/mL?

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15. Suppose the reaction: A + 2B------> AB₂ occurs by the following mechanism:
Step 1 A + B-----> AB slow
Step 2 AB + B------> AB₂ fast
Overall A + 2B-------> AB₂
The rate law expression must be Rate =_________.

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16. Consider the following reversible reaction. In a 3.00 liter container, the following amounts are found in equilibrium at 400 °C: 0.0420 mole N₂, 0.516 mole H₂ and 0.0357 mole NH₃. Evaluate Kc.
N₂(g) + 3H₂(g) -------> 2NH₃(g)
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17. Identify the subshell in which electrons with the quantum numbers n = 3, l = 2 may be found.

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18. The decomposition of carbon disulfide,CS₂, to carbon monosulfide, CS, and sulfur is first order with k = 2.8 x 10-⁷s-¹ at 1000oC. CS₂-------> CS + S What is the half-life of this reaction at 1000oC?

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19. Consider the following system in a 1.00 L container: A(g) + B(g)-------> 2C(g)The

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equilibrium concentrations at 200oC were determined to be: [A] = 0.200 M [B] = 3.00 M [C] = 0.500 M How many moles of A must be added to increase the concentration of C to 0.700 M at 200oC?

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20. How many milliliters of 0.200 M NH₄OH are needed to react with 12.0 mL of 0.550 M FeCl₃?
FeCl₃ + 3NH₄OH --------> Fe(OH)₃ +3NH₄Cl

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21. At 445°C, Kc for the following reaction is 0.020. 2HI(g)--------> H₂(g) + I2(g) A mixture of H₂, I₂,

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and HI in a vessel at 445°C has the following concentrations: [HI] = 2.0 M, [H₂] = 0.50 M and [I₂] = 0.10 M. Which one of the following statements concerning the reaction quotient, Qc, is TRUE for the above system?

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22. Which one of the following sets of quantum numbers could be those of the distinguishing (last) electron of Mo?

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23. In new spectrometers each ion hits a

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24. Which of the following statements is correct for an electron that has the quantum numbers n = 4 and ml = -2?

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25. Which of the following electron configurations is correct for nickel?

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The average score is 49%

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