1.	Using the rules of significant figures, calculate the following:
	
A)	15.9	
B)	17	
C)	16	
D)	91	
E)	15.92	

2.	The melting point of lead is 402oC. What is this on the Fahrenheit scale?
	(TF = TC  (9oF / 5oC) + 32oF)	
A)	7.556e2 oF	
B)	8e2 oF	
C)	1.03e3 oF	
D)	7.56e2 oF	
E)	6.92e2 oF	

3.	Gallium consists of two isotopes of masses 68.95 amu and 70.95 amu with abundances of 60.16% and 39.84%, respectively. What is the average atomic mass of gallium?	
A)	69.95	
B)	70.15	
C)	71.95	
D)	69.75	
E)	69.55	

4.	What is the mass of 9 atom(s) of copper in grams?	
A)	571.9 g	
B)	1.05e21 g	
C)	4.25e24 g	
D)	6.022e23 g	
E)	9.50e–22 g	

5.	Phosphorus has the molecular formula P4 and sulfur has the molecular formula S8. How many grams of phosphorus contain the same number of molecules as 5.36 g of sulfur?	
A)	2.59 g	
B)	0.386 g	
C)	5.18 g	
D)	5.36 g	
E)	none of these	

6.	How many atoms of hydrogen are present in 3.0 g of water?	
A)	1.0e23	
B)	9.0e23	
C)	3.6e24	
D)	2.0e23	
E)	0.33	

7.	Adipic acid contains 49.32% C, 43.84% O, and 6.85% H by mass. What is the empirical formula?	
A)	C3H5O2	
B)	C3H3O4	
C)	C2HO3	
D)	C2H5O4	
E)	C3HO3	

8.	Determine the coefficient for O2 when the following equation is balanced in standard form (smallest whole number integers)
               C4H10(g) + O2(g) ® CO2(g) + H2O(g)	
A)	4	
B)	8	
C)	10	
D)	13	
E)	20	

9.	Sulfuric acid may be produced by the following process:

	4FeS2 + 11O2  2Fe2O3 +8SO2
	2SO2 +O2  2SO3
	SO3 + H2O  H2SO4

How many moles of H2SO4 will be produced from 8.67 moles of FeS2?	
A)	47.7	
B)	8.67	
C)	17.3	
D)	4.34	
E)	34.7	

10.	The reaction of 11.9 g of CHCl3 with excess chlorine produced 10.7 g of CCl4, carbon tetrachloride:

What is the percent yield?	
A)	100. %	
B)	34.9 %	
C)	69.8 %	
D)	90 %	
E)	46.5 %	

11.	1.00 mL of a 3.50 × 10–4 M solution of oleic acid is diluted with 9.00 mL of petroleum ether, forming solution A. 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether, forming solution B. How many grams of oleic acid are 5.00 mL of solution B? (molar mass for oleic acid = 282 g/mol)	
A)	4.94 × 10–4 g	
B)	7.00 × 10–6 g	
C)	4.94 × 10–5 g	
D)	1.97 × 10–6 g	
E)	9.87 × 10–6 g	

12.	How many grams of NaCl are contained in 350. mL of a 0.200 M solution of sodium chloride?	
A)	11.7 g	
B)	4.09 g	
C)	8.18 g	
D)	70.0 g	
E)	none of these	

13.	Which of the following aqueous solutions contains the greatest number of ions?	
A)	400.0 mL of 0.10 M NaCl	
B)	300.0 mL of 0.10 M CaCl2	
C)	200.0 mL of 0.10 M FeCl3	
D)	200.0 mL of 0.10 M KBr	
E)	800.0 mL of 0.10 M sucrose	

14.	A 230.0-mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning the solution is 1.05 M. What volume of solvent has evaporated from the 0.275 M solution?	
A)	60.2 mL	
B)	63.3 mL	
C)	169.8 mL	
D)	230. mL	
E)	290.2 mL	

15.	The net ionic equation for the reaction of calcium bromide and sodium phosphate contains which of the following species?	
A)	Ca2+(aq)	
B)	PO43–(aq)	
C)	2Ca3(PO4)2(s)	
D)	6NaBr(aq)	
E)	3Ca2+(aq)	

16.	You mix 260. mL of 1.20 M lead(II) nitrate with 300. mL of 1.90 M potassium iodide. The lead(II) iodide is insoluble. Which of the following is false?	
A)	The final concentration of Pb2+ ions is 0.0482 M.	
B)	You form 131 g of lead(II) iodide.	
C)	The final concentration of K+ is 1.02 M.	
D)	The final concentration of NO3- is 1.02 M.	
E)	All are true.	

17.	How many of the following salts are expected to be insoluble in water?
sodium sulfide            barium nitrate
	ammonium sulfate       potassium phosphate	
A)	none	
B)	1	
C)	2	
D)	3	
E)	4	

18.	You have 75.0 mL of a 2.50 M solution of Na2CrO4(aq). You also have 125 mL of a 2.07 M solution of AgNO3(aq). Calculate the concentration of CrO42- when the two solutions are added together.	
A)	0.00 M	
B)	0.291 M	
C)	0.188 M	
D)	0.259 M	
E)	2.50 M	

19.	A student weighs out 0.673 g of KHP (molar mass = 204 g/mol) and titrates to the equivalence point with 36.78 mL of a stock NaOH solution. What is the concentration of the stock NaOH solution? KHP is an acid with one acidic proton.	
A)	3.30e–3 M	
B)	1.21e–1 M	
C)	1.83e–2 M	
D)	0.0897 M	
E)	none of these	

Answer Key

1.	C	
2.	D	
3.	D	
4.	E	
5.	A	
6.	D	
7.	A	
8.	D	
9.	C	
10.	C	
11.	E	
12.	B	
13.	B	
14.	C	
15.	E	
16.	D	
17.	A	
18.	B	
19.	D