Reference no: EM132526989
Answers only. Thank you.
1. What is the pH at the equivalence point in the titration of 100 mL of 0.10 M HCl with 0.10 M NaOH?
A) 1.0
B) 7.0
C) 8.0
D) 6.0
E) 13.0
2. Iron has a density of 7.87 g/cm3. What mass of iron would be required to cover a football playing surface of 120 yds × 60 yds to a depth of 1.0 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g)
A) 4.7 × 107 lb
B) 6.4 × 103 lb
C) 4.7 × 108 lb
D) 1.0 × 105 lb
E) 6.4 × 104 lb
3. Calculate the mass of 4.50 moles of chlorine gas, Cl2.
A) 4.50 g
B) 6.34 × 10-2 g
C) 15.7 g
D) 319 g
E) 160. g
4. For which type of titration will the pH be basic at the equivalence point?
A) Weak acid vs. strong base.
B) Strong acid vs. strong base.
C) Strong acid vs. weak base.
D) All of the above.
E) None of the above.
5. Express the number 0.000053 in scientific notation.
A) 5.3 × 10-6
B) 5.3 × 10-5
C) 5.3 × 10-3
D) 5.3 × 10-2
E) 5.3 × 10-4
6. Many home freezers maintain a temperature of 0°F. Express this temperature in °C.
A) 18°C
B) -18°C
C) 57.6°C
D) -32°C
E) 0°C
7. What mass of C6H12O6 (glucose) is needed to prepare 450. mL of a 0.650 M solution of glucose in water?
A) 125 g
B) 0.692 g
C) 0.293 g
D) 293 g
E) 52.7 g
8. When 38.0 mL of 0.1250 M H2SO4 is added to 100. mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471 g, what was the concentration of iodide ions in the original solution?
A) 3.10 × 10-4 M
B) 1.55 × 10-3 M
C) 1.55 × 10-4 M
D) 3.11 × 10-3 M
E) 6.20 × 10-3 M
9. A piece of metal with a mass of 611 g is placed into a graduated cylinder that contains 25.1 mL of water, raising the water level to 56.7 mL. What is the density of the metal?
A) 7.13 g/cm3
B) 19.3 g/cm3
C) 8.96 g/cm3
D) 10.5 g/cm3
E) 2.70 g/cm3
10. A 3.682 g sample of KClO3 is dissolved in enough water to give 375. mL of solution. What is the chlorate ion concentration in this solution?
A) 0.118 M
B) 4.41 × 10-2 M
C) 8.01 × 10-2 M
D) 1.65 × 10-2 M
E) 3.00 × 10-2 M
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