Review+Problems


 * Chapter 2**

__Sig. Figs.__ a) 9873  b) 0.07803  c) 0.0034003500

d) 30045 e) 2200

__Scientific Notation__ a) 0.002793 b) 2 345 000 000

c) 0.000230090 d) 101

__Metric Conversions__ a) ? mm3 = 0.987 km3

b) 12. 9 cm = ? km

c) 45.00 g/mL = ? kg/L

__Density__ a) Determine the density of an object that has a mass of 34.56 g and a volume of 12.4 mL.

b) A piece of metal is placed in a graduated cylinder containing 23.45 mL of water. The volume of the water increases to 26.78 mL. If the density of the metal is 2.70 g/mL, what is the mass of the metal?

__Temperature__

a) ? ° C = 245 K

b) ? K= 45.67 ° C


 * Chapter 3 and 4

1. Classify each of the following as a homogeneous or heterogeneous mixture. a) milk- b) fog- c) salt water- d) smoke- e) a tennis ball-

2. Classify each of the following as element, compound, or mixture (homogeneous or heterogeneous) a) salt- b) aluminum- c) lemonade- d) sugar- e) blood- **

3. Classify each as a physical property or a chemical property. a) salt is very soluble in water- b) ice has a melting point of 100 degrees C- c) Iron had a tendency to rust when left out in the rain- d) Hydrogen gas makes a loud popping sounds when a lit match is brought near- e) Sulfur compounds often smell bad-

4. Classify each as a physical change or a chemical change. a) a ring of scum appears in the bath tub- b) a steak is cooked- c) sugar is dissolved in water- d) gasoline is burned- e) a piece of copper wire is bent- f) hydrogen gas and oxygen gas are changed into water-

5. When 9.44 g of calcium are heated in air, 13.22 g of calcium oxide are formed. How many grams of oxygen from the air combined with the calcium? What is the percent by mass of oxygen in the compound?

6. Barium iodide, BaI2 contains 35% Barium by mass. An 8.50 g sample of barium iodide contains what mass of iodine?

7. How much heat is given off by a 50 g sample of copper wire when it cools form 80 C to 50 C?

8. When 5 g of chromium at 23 C absorbs 62.5 J of heat, the temperature increases to 50.8 C. What is the specific heat of the chromium?

9. Which element is a liquid at room temperature? a) Fluorine b) Chlorine c) Bromine d) Iodine

10. The elements on the periodic table are placed in order of increasing a) density b) atomic number c) boiling point d) atomic mass

11. Which symbol represents a metallic element? a) P b) Ti c) Si d) I

12. Which element is not reactive? a) Hydrogen b) Oxygen c) Iron d) Helium

13. Which is a molecular compound? a) air b) lead c) water d) table salt

14. Which is a halogen? a) chlorine b) helium c) potassium d) calcium

Differentiate between: a) an atom and an ion-

b) an atom and a molecule-

c) an element and a compound-

d) an anion and a cation-

15. The specific heat of gold is 0.131 J/g C. A 400 g sample of gold at 350 C is dropped into 180 g of water at 22 C. Assume no heat is lost to the environment. a) what will be the final temperature of the water?

b)what will be the final temperature of the gold?


 * Chapter 5 and 6**

__Write names:__ 1. KI

2. BaS

3. K 2 Se

4. CaF 2 5. KIO 3

6. Ag 2 C 2 O 4 7. P 2 O 5

8. CL 2 O 7

9. H 2 SO 4 (aq)

10. H 3 PO 3 (aq) __Write the Formula:__ 1. Lithium iodide

2. Aluminum phosphide

3. Calcium phosphide

4. Aluminum chloride

5. Cadmium dichromate

6. Lead (IV) carbonate

7. Tetraphosphorous decoxide

8. Krypton triiodide

9. Hydrobromic acid

10. Oxalic acid

__Multiple Choice:__

1. The electron was discovered by: a. Rutherford b. Thomson c. Bohr d. Galileo e. Einstein

2. The nucleus was discovered by: a. Rutherford b. Thomson c. Bohr d. Galileo e. Einstein

3. Which of the following would be least likely to form an ionic compound with oxygen? a. sodium b. barium c. fluorine d. aluminum e. iron

4. If an imaginary compound, X 2 Y 3, is formed, what is most likely the charge on X? a. +1 b. +2 c. +3 d. -3 e. -2
 * Chapter 7

Chapter 8

Chapter 9

Chapter 10

Chapter 11**