1. Which of the following is not an element in its pure form?
A. Cl2B. NaC. ID. TlE. Se
2. The formula of the compound formed between Pd4+ and N3- is
A. PdN2B. Pd4N3C. Pd2ND. PdN4E. Pd3N4
3. The formula of the compound formed between Pd4+ and O2- is
A. Pd2O4B. PdO2C. Pd4O2D Pd2OE. PdO
4. Ernest Rutherford discovered
A. String cheeseB. ProtonsC. ElectronsD. The nucleusE. Neutrons
5. Beryllium forms ions with what charge?
A. +3B. +2C. +1D. -1E. -2
6. Oxygen forms ions with what charge?
A. +2B. +1C. -1D. -2E. Unknown
7. Which of the following elements is a halogen?
A. BrB. HC. LiD. SeE. Ir
8. Which of the following elements is NOT a transition metal?
A. ScB. PbC. RhD. NdE. V
9 An element has 18 electrons and a negative three charge. The element is
A. ArB. ScC. FD. PE. S
10. An element has an atomic mass of 103 and has 57 neutrons. The element is
A. PdB. LaC. RhD. LrE. Fe
11. What is the name for Cu2SO4?
a. Copper(I) sulfateb. Copper(II) sulfatec. Copper(I) sulfoxide
d. Copper(II) sulfoxidee. Copper(I) sulfide
12. Which is the formula for gold(II) nitrate?
a. AuN2b. AgNO3c. Au2NO3d. Au(NO3)2e. Au2N
13. What is the value of (2.88 x 1025) / (2.00 x 10-5)?
a. 14.4 x 1030b. 1.44x 1020c. 144 x 1028
d. 0.144 x 1030e. 1.44x 10-125
14. How many significant figures does 0.006090 g have?
a. 2b. 3c. 4d. 5e. 6
15. Which of the following units are measurements of density?
I. g/gallonII. lbs/cm2III. kg/m3IV. mL/in3
a. I and IIb. I and IIIc. II and IVd. III and IVe. I, II, and III
16. How many moles of Fe(NO3)2 are there in a sample that weighs 15g?
a. 0.083 molesb. 2.5x1023 molesc. 9x1024 molesd. 12 molese. 179.9 moles
17. How many moles of chloride are there in one mole of CaCl2?
a. ½ b 1c. 2d. 12.044x1023e. 6.022x1023
18. If I weigh out 5.0 g of each of the following compounds, of which one have I weighed out the greatest number of molecules?
a. NaClO3 b. CaCl2 c. MgCl2 d. K2O e. Ca(ClO3)2
19.It is estimated that there are 169,000,000 pet fish in the United States. How many moles of pet fish are there?
a. 2.80 x 10-15b. 1.01 x 1032c. 2.8 molesd. 280 x 10-18e. 1.01 moles
20. How many valence electrons does a selenium ion have?
a. 4b. 6c. 8d. 16e. 18
21. Select the pair of elements/ions that are isoelectronic
a. Na+ and Rb+b. Na+ and O2-c. Na+ and Br-d. Na and Ne
22. There is no number 22. It was scared off by a pack of hungry wolves, and fled for its life.
23. How many total electrons are there in d orbitals in an atom of Osmium?
a. 0b. 6c. 10d. 26e. 30
24. With a 0.3 M sodium chloride solution in hand, I decide to take 200 mL of the 0.3 M sodium chloride solution and mix it with 140 mL of 0.7 M sodium chloride solution. What is the new concentration?
a. 0.5 Mb. 0.16 Mc. 0.46 Md. 0.27 Me. 0.63 M
25. An unknown compound forms a precipitate when mixed with AgNO3 and with NaOH, but not with MgSO4. Which of the following could be our unknown?
a. MgCl2b. Pb(NO3)2c. KCld. ZnSO4e. BaBr2
26. Iron, like many things, can react with hydrochloric acid:
2Fe + 6HCl → 2FeCl3 + 3H2
In which of the following cases is hydrochloric acid the limiting reagent?
A) 0.6 moles Fe, 1.6 moles HClB) 1 mole Fe, 8 moles HCl
C) 0.8 moles Fe, 2.5 moles HClD) 0.02 moles Fe, 0.09 moles HCl
E) 0.02 moles Fe, 1.6 moles HCl
27. Nitrogen triiodide decomposes violently according to the following reaction:
2NI3 → N2 + 3I2
If 0.5 moles of nitrogen triiodide are reacted, the theoretical yields of nitrogen and iodine molecules are
A) 0.5 moles N2, 0.5 moles I2B) 1.0 moles N2, 0.67 moles I2
C) 0.25 moles N2, 0.67 moles I2D) 0.25 moles N2, 0.75 moles I2
E) 1.0 moles N2, 3 moles I2
28. What temperature will a 1.0 kg chunk of copper (c=0.39 J/g*oC) reach if 450 J of heat is applied to it, starting at room temperature (22 oC)?
a. 23.15 oCb. 273.15 oCc. 20.95 oCd. 1175.85 oCe. 73.25 oC
29. H2O2 (l) → H2O + ½O2H = -98.2 kJ/mol
When this reaction is performed with 68 g of hydrogen peroxide, how much heat is released or absorbed by the reaction?
a. 49.1 kJb. 98.2 kJc. -98.2 kJ d. 196.4 kJe. -196.4 kJ
30. If I have a bottle at 1 atm and 20 oC, and I want to raise the pressure to 2 atm, I must change the temperature to:
(a) 40 oC(b) 10 oC (c) 313 oC(d) -126.5 oC (e) 586 oC
31. A balloon contains 0.76 mol N2 , 0.18 mol O2 , 0.031 mol He and 0.026 mol H2 at 739 mm
Hg. What is the partial pressure of O2 ?
(a) 19 mm Hg(b) 23 mm Hg(c) 133 mm Hg(d) 560 mm Hg
Use the following (unbalanced) reaction for questions 32-33:
C2H7NO (g) + O2 (g) ____ (g) + H2O (g) + NO2 (g)
32. The missing product of this reaction is
a. O2b. C2Oc. CO2d. CO3e. C 2
33. If 12.0 moles of C2H7NO are reacted with 48.0 moles of O2, the number of moles of water produced is
a. 60.0b. 12.0c. 35.4d. 42.0e. 39.5
34. The pH of a 0.01 M NaOH solution is
a. 0.01b. 1c. 2d. 12e. 14