Match Each Word with Its Correct Definition(14 Points)

General Chemistry 101.001 EXAM 1

Section A Vocabulary

Match each word with its correct definition(14 points)

______1. Physical ChangeA. A way of representing the

composition of a compound/substance.

______2. TheoryB. Electrically charged atoms or groups of

atoms.

______3. ElementC. Substances being transformed into

different substances.

______4. Periodic TableD. A mixture where the properties are the

same thoughout.

______5. AtomE. Substances composed of only one type of

atom.

______6. Chemical CompoundF. A change in physical properties of a

compound/substance.

______7. Heterogeneous MixtureG. A tentative explanation or prediction of

experimental observations.

______8. Extensive PropertiesH. Depends on amount of

compound/substance present.

______9. Chemical FormulaI. An organizal system of all known

elements.

______10. HypothesisJ. Doesn’t depend on the amount if

compound/substance.

______11. Homogenous MixtureK. Smallest component of an element

having the chemical properties of the element.

______12. Intensive PropertiesL. A mixture where there are different

regions with varying properties.

______13. Chemical ChangeM. A set of statements or principles

devised to explain a group of facts or phenomena.

______14. IonN. A substance composed of two or

more different elements.

Define the following terms(12 points)

Qualitative

Quantitative

Precision

Accuracy

Section BGeneral Questions

1. Correctly place the following steps of the Scientific Method in order from first to last using 1 for the first step to 6 for the last step. (6 points)

______Summarize results and replicate

______Formulate a Hypothesis

______Pose a reasonable question

______Communicate results with the scientific community

______Collect date from experiments

______Formulate a Theory

2. Give the three states of matter. (3 points)

3. List three physical properties you can numerically measure. (3 points)

SECTION CNumerical Data Handling

Give the correct number of Significant Figures in each of the following measurements. (6 points)

______1. 3.45 g

______2. 0.02 mL

______3. 0.00670 cm

______4. 81000 g

______5. 69.003 dm3

______6. 50200.0 kg

Convert the following measurements from Decimal Notation to Scientific Notation. (4 points)

1. 0.000009 g______

2. 346700 L______

3. 205 mol______

4. 0.01402 s______

Convert the follow numbers from Scientific Notation to Decimal Notation. (4 points)

1. 3.025 x 103______

2. 8 x 10-5______

3. 16.05 x 10-4______

4. 0.71 x 102______

Correctly answer the following problems in the correct number of significant figures. (6 points)

1. (110.7-64) =______

(0.056)(0.00216)

2. (1.68) x (23.56-2.305) =______

1.248

SECTION DPROBLEM SOLVING

1. Classify the following as a physical change or chemical change. (5 points)

a. disgestion of food______

b. smashing a car against a tree______

c. fermentation to produce beer______

d. dissolving sugar into water______

e. rusting of iron______

2. Determine whether each of the following properties is extensive or

intensive. (5 points).

a. length______

b. volume______

c. temperature______

d. density______

e. mass______

3. The density of glycerine is 1.26 g/mL. Calculate the mass in grams of

400 mL of glycerine. Show prodecure. (4 points)

4. Convert 25F to a) Celsius and b) Kelvins. Show prodecure. (4 points)

5. A marathon runner covers a distance of 40.0 km. a) What is the distance in

meters? b) In miles? (4 points)

EXTRA CREDIT (4 points)

Three liquids of different densities are mixed together. Because they are not miscible they form discrete layers,one on top of the other. The liquids are carbon tetrachloride (CCl4, d = 1.58 g/cm3), mercury (d = 13.456 g/cm3) and water (d = 1.00 g/cm3). A) Identity what type of mixture this is. B) If you have (blank) grams of CCl4 and (blank) cm3 of of water, how many grams of mercury are in a mixture with a (blank) number of mL?

(blank) cm3 = (blank) mL