###### Semester Test - Name ____________________

1. _____ If 1.0 L of a 0.50 M NaCl solution is diluted to 2.5 X 103 mL, what is the molarity of the resulting solution?

• a) 0.20 M
• b) 2.0 X 10-4 M
• c) 4.0 X10-3
• d) 0.40
• e) 0.002 M

2. _____ How many of the following numbers have 5 significant figures - (19.000), (0.00006), (1.6090 X 108), (13607)?

• a) 0
• b) 1
• c) 2
• d) 3
• e) 4

3. _____ The correct formula for Nitric Acid is:

• a) HNO4
• b) H2NO3
• c) HNO2
• d) HNO3
• e) H2NO

4. _____ Iron (III) Sulfite has the formula

• a) Fe3SO3
• b) Fe2(SO4)3
• c) Fe2(SO3)3
• d) Fe2SO4
• e) Fe2SO3

5. _____ 10.0 g of a liquid that has a density of 20.0 g/mL needs to be measured out in a graduated cylinder. What volume should be used?

• a) 200. mL
• b) 2.00 mL
• c) 20 mL
• d) 0.500 mL
• e) 1.00 mL

6. _____ One gram of alum, KAl(SO4)2 . 12H2O, contains 1.3 X 1021 Al atoms. How many oxygen atoms are contained in 1.0 g alum?

• a) 1.2 X 1021
• b) 2.6 X 1022
• c) 1.6 X 1022
• d) 1.0 X 1022
• e) 2.1 X 1022

7. _____ If 12.0 g of PCl5 reacts completely with water in the balanced chemical reaction below, how many grams of HCl will be produced?

PCl5 + 4H2O --> H3PO4 + 5HCl

• a) 10.5 g
• b) 2.10 g
• c) 0.420 g
• d)0.0952 g
• e) 0.0576 g

8. _____ When the equation below is properly balanced, what is the coefficient for S8?

_____ Cr + _____ S8 --> _____ Cr2S3

• a) 1
• b) 2
• c) 3
• d) 4
• e) none of these

9. _____ An antacid tablet containing 0.50 g of NaHCO3 is dissolved in 250 mL of water. What is the molar concentration of HaHCO3 in the solution?

• a) 0.024 M
• b) 4.1 M
• c) 0.022 M
• d) 0.0060 M
• e) 0.0041 M

10. _____ What is the molecular weight of H2O?

• a) 16.00 g
• b) 18.0 g
• c) 32.0 g
• d) 2.0 g
• e) 34.0 g

11. _____ How many mL of 0.250 M H2SO4 is required to completely react with 25.0 mL of 1.500 M NaOH?

• a) 150. mL
• b) 50.0 mL
• c) 300. mL
• d) 75.0 mL
• e) none of these

12. _____ Assume that you are a physician administering a drug in a solution containging 5.0 mg drug/L solution. If the recommended dosage of the drug is 3.5 X 10-6 g per kilogram of body weight, what volume of solution would you prescribe daily for a 150 lb patient (1 lb = 454 g)?

• a) 48 mL
• b) 53 mL
• c) 86 mL
• d) 23 mL
• e) 97 mL

13. _____ 50 mL of 0.50 M Na2SO4 is diluted to 5.00 L with water. Calculate the new concentration of the solution.

• a) 5.0 X 10-3 M
• b) 0.50 M
• c) 5.0 X 103 M
• d) 1.00 M
• e) 5.0 M

14. _____ What is the approximate weight of 5.6 liters of Sulfur Dioxide (SO2)?

• a) 44
• b) 16
• c) 32
• d) 64
• e) 22.4

15. _____ What is the number of molecules in 5 mL of Oxygen Gas (O2)?

• a) 6.023 X 1023
• b) 2.7 X 1024
• c) 1.3 X 1020
• d)1.3 X 1023
• 6.023 X 1020

16. _____ What is the number of molecules in 3 grams of Carbon Dioxide (CO2)?

• a) 4.1 X 1022
• b) 6.023 X 1023
• c) 8.8 X 1024
• d) 4.4 X 1024
• e) 6.023 X 1020

17. _____ How many grams of Potassium Chlorate (KClO3) is needed to produce 16 grams of Oxygen Gas (O2) in the following Equation?

_____ KClO3 -----> _____ KCl + _____ O2

• a) 96
• b) 41
• c) 246
• d) 150
• e) 123

18. _____ What is the percentage of Oxygen in Potassium Chlorate?

• a) 39
• b) 29
• c) 32
• d) 16
• e) 48

19. _____ Which of the following is equivalent to 10 millimeters?

• a) meter
• b) kilometer
• c) centimeter
• d) decimeter
• e) none of these

20. _____ 77o Fahrenheit equals how many degrees Celsius.

• a) 32
• b) -40
• c) 98.6
• d) 25
• e) 170.6

The following are names of reagents you worked with on a daily basis during the second nine weeks of laboratory procedures relating to the metals of groups I-V. For each of the following provide the name of the reagent.

1. _______________ NH4NO3
2. _______________ CH3CSNH2
3. _______________ KNO2
4. _______________ NH4CNS
5. _______________ CH3COOH
6. _______________ K2CrO4
7. _______________ Pb(C2H3O2)2
8. _______________ NaBiO3
9. _______________ NaClO
10. _______________ CH3CH2OH
11. _______________ H2SO4
12. _______________ NH4OH
13. _______________ NH4C2H3O2

Each of the previous 33 questions have a value of 3 points. Good Luck.