Esp-chemistry Test I

Chemistry I – ESP test 1 – September 28, 2009 1. 2. 3. 4. 5. 6. 7. 8.

True or False: Ultraviolet light has smaller photon energy than do Gamma rays. True or False: A neutral manganese atom contains 12 electrons. True or False: The speed of any wave is calculated by wavelength times frequency. True or False: Both 3p and 4p subshells are made up of 3 orbitals. True or False: Intensive property is a physical property that is independent of the amount of material. True or False: Condensation requires the absorption of heat. True or False: Electrons are particles, not waves. True or False: the ground state of “d4 and d9” (such as Cu and Cr) will be d5 and d10 by taking an electron in the S subshell without excitation.

9.

Convert the speed of sound (340. m/s) into miles per day. 5280 ft = 1 mile 1 inch = 2.54 cm a. b. c. d. e.

0.211 miles/day 2.94 x 107 miles/day 1.83 x 104 miles/day 2.94 x 109 miles/day None of the above

10. Krypton is an example of: a. b. c. d. e.

Noble gas Halogen Alkali Metal Transitional metal None of the above

11. A newly discovered element is called Ramlisa, it has three isotopes of 302Rm (2.8900% abundance), 303Rm (35.900% abundance), and 304Rm, what is the atomic mass? a. b. c. d. e.

303.00 303.58 302.93 303.21 None of the above

12. How many electrons, protons, and neutrons are in a C2O4- ion? (assume only 12C and 16O answer choices in that order) a. 89, 44, 44 b. 29, 14, 14 c. 29, 44, 14 d. 88, 43, 43 e. None of the above

13. 4.72 g of compound Carbon, hydrogen and silver was burned in oxygen, yielding 7.95 g of CO2, 1.02 g H2O and 3.02 g of mixture of Silver and silver oxide. What is the empirical formula of the compound? a. b. c. d. e.

C8H5Ag C5H8Ag C24H36Ag C8HAg3 None of the above

14. Find the density of the material, given that a 5.03 g sample occupies 3.24 mL. What is the mass of the sample of material that has a volume of 55.1 cm3. a. b. c. d. e.

35.5 g 5.51 g 28.2 g 85.6 g None of the above

15. An ion with a negative two charge contains 36 electrons and 45 neutrons. Which of the following is correct? a. b. c. d. e.

The number of protons in the element is also 36. The ion has 34 protons. The atomic number of the element is 36. The mass number of the element is 81. None of the above

16. How many grams of Cu2S are in 4.85 x 1022 molecules of Cu2S? a. b. c. d. e.

48.2 g 7.69 g 12.8 g 5.11 g None of the above

17. To determine the density of trichloroethylene, a liquid used to degrease electronic components, a flask first weighed empty (108.6 g) it is then filled with 7.63 in3 of trichloroethylene to give a total mass of 291.4 g. What is the density of trichloroethylene in kg per m^3. a. b. c. d. e.

1.46 kg/m3 0.943 kg/m3 1462 kg/m3 23.9 g/ml None of the above

18. How many atoms of hydrogen are there in 16.4 grams of CH3CH2CH2COOH? a. b. c. d. e.

8.98 x 1023 1.12 x 1023 4.49 x 1023 2.24 x 1023 None of the above

19. Which of the following shows the lowest temperature? Hint: T(°F) + 459.7 = T(°R) a. 10 oC b. 283.15 K c. 509.7 oR d. 50 oF e. They are all the same. 20. How many moles of Cl atoms are there in 65.2 g CHCl3? a. b. c. d. e.

1.64 mol 0.546 mol 1.34 mol 2.73 mol None of the above

21. How many electrons can fit in a 5f subshell? a. b. c. d. e.

2 6 7 14 None of the above

22. How many radial and angular nodes does a 4d orbital have? a. b. c. d. e.

1 radial, 3 angular 3 radial, 1 angular 2 radial, 2 angular 1 radial, 2 angular None of the above

23. What is the energy emitted when a Hydrogen electron goes from n=4 to n=3? a. b. c. d. e.

1.06 x 10-9 J 1.82 x 10-19 J 1.65 x 1038 J 1.82 x 1027 J None of the above

24. Which of the following is an excited state? a. b. c. d. e. f.

1s22s22p63s23p64s13d5 1s22s22p63s23p64s13d4 1s22s22p63s23p64s13d10 1s22s22p63s23p64s23d3 1s22s22p63s23p64s23d6 None of the above

25. Which of these quantum number set is illegal in the format of (n, l, ml, ms)? Circle all that applies. a. b. c. d. e. f.

(1, 0, 0, ½) (3, 2, -1,- ½) (2, 2, -2, ½) (3, -3, 0, ½) (4, 1, -1, 0) None of the above

26. How many sig fig would be in the answer to: (3.94 − 3.4)2 (4.2326 𝑥 108 )16 9.741 𝑥 106 a. 2 b. 3 c. 4 d. 5 e. None of the above 27. Which of the following valence shell orbitals receives the least amount of attraction from the nucleus, due to electron shielding? (hint: think of Slater Rule) a. b. c. d. e.

Al P Cl Ar All the same

28. Which of the following are in the order of increasing atomic radius? a. b. c. d. e.

Rb, K, Na, Li K, Ca, Sc, Cr In, Ge, P, O Cl, S, Te, F None of the above

29. Which orbital is this?

a. b. c. d. e.

S P D F None of the above

30. How many unpaired electrons are in a neutral Mo atom? a. b. c. d. e. f.

1 2 3 4 5 None of the above

31. Put P for paramagnetic and D for diamagnetic for each of the following neutral atoms: a. b. c. d. e. f. g.

Titanium Cobalt Copper Xeon Calcium Potassium Zinc

___ ___ ___ ___ ___ ___ ___

32. In hydrogen, an electron was excited to the 2nd energy level. When the electron falls back into the 1st energy level, emitting UV wave in a vacuum, what is the energy (J/photon) that will be emitted? Where Rinifite = 1.097 x 10 7 m-1 a. 3.22x10-18 J b. 1.61x10-18 J c. 1.61x10-17 J d. 8.05x10-19 J e. None of the above 33. Of these orbitals, which are antisymmetrical? (circle all that apply) a. s b. p c. f d. d e. none of the above