Semester Exam 1

Question 1

Scientists classify matter on the basis of its physical and _____________ properties

Answer 1

Chemical

Question 2

Copper is used more often than aluminum for electric wires. More than anything else, this suggests that copper is ________________________ than aluminum

Answer 2

More conductive

Question 3

The amount of matter packed into a given volume determines its

Answer 3

Ductility

Question 4

Oxygen (O2) is a ________________________

Answer 4

Diatomic element

Question 5

Hydrogen peroxide (H2O2) is a ______________

Answer 5

Compound

Question 6

How many atoms of oxygen are present in Al2(SO4)3

Answer 6

12

Question 7

Dry ice has a temperature of 196 K. What is the temperature of dry ice on a Celsius scale?

Answer 7

-77*C

Question 8

A substance can experience a change of state as ____________ energy is added to or removed from it

Answer 8

Thermal

Question 9

When water vapor forms dew on the grass, _________________ has occurred

Answer 9

Condensation

Question 10

Physical or Chemical Property. A shovel rusts in humid air.

Answer 10

Chemical

Question 11

Physical or Chemical Property. Water evaporates at 100*C.

Answer 11

Physical

Question 12

Physical or Chemical property. Sulfur mixed with an acid produces a gas.

Answer 12

Chemical

Question 13

Physical or Chemical Property. Lead melts in a hot flame.

Answer 13

Physical

Question 14

Convert -145.6*C to Kelvins.

Answer 14

127.55*K

Question 15

The temperature outside is 87*F. What is that temperature in degrees Celsius?

Answer 15

30.56*C

Question 16

What does 35.600 equal in kilograms?

Answer 16

35.6

Question 17

You measure the products of a chemical reaction three times and obtain 8.15 g, 8.16g, and 8.13 g. The actual mass is 8.14 g. Your measurements are _______________________________.

Answer 17

Both accurate and precise

Question 18

The smaller the percent error of a measurement, the more _____________ the measurement.

Answer 18

Accurate

Question 19

Using scientific notation, convert 463 kg to milligrams.

Answer 19

4.63 X 10^8 mg

Question 20

The measurement 0.00500610 m has how many significant figures?

Answer 20

6

Question 21

How many significant figures are in the measurement 0.017000 g

Answer 21

5

Question 22

One gallon (3785 mL) of gasoline has a mass of 2540 g. What is the density of gasoline?

Answer 22

0.671 g/mL

Question 23

Perform the following operation: (26.9 cm)(5.0 m)

Answer 23

1.3 m^2

Question 24

Perform the following operation: 16.1 mL - 6.81 mL - 0.00032 mL.

Answer 24

9.3 mL

Question 25

What volume does 1-carat (0.2 g) diamond occupy? (density = 3.27 g/mL)

Answer 25

0.06 mL

Question 26

The measurement 1.000010 has how many significant figures?

Answer 26

7

Question 27

A(n) _________ system of measurment is any system of measurement based on a decimal scale.

Answer 27

Metric

Question 28

The scale of a measuring instrument is ________________, that is, accurately subdivided into measurement units.

Answer 28

Graduated

Question 29

Significant digits apply only to ______________ data, not to counted or pure numbers.

Answer 29

Measured

Question 30

A measurement is made of two essential parts. What are two parts?

Answer 30

Unit and number

Question 31

You measure the mass of a product in a chemical reaction to be 1.87 g. Theoretical calculations predict that you should have obtained 1.95 g. What is the percent error?

Answer 31

4.1%

Question 32

Which has the greatest number of significant figures: 35,620 cars, 2.35 m, 25,000 mL?

Answer 32

2.35m

Question 33

Perform the following operation, observing significant digits: 7.491 m + 60.2 m + 1.00224 m.

Answer 33

68.7 m^3

Question 34

How many significant digits are in the quantity of 17 nickels?

Answer 34

0

Question 35

You measure the mass of a product in a chemical reaction to be 1.87 g. Theoretical calculations predict that you should have obtained 1.95 g. What is the percent error?

Answer 35

4.1%

Question 36

How many electrons can a d sublevel hold?

Answer 36

10

Question 37

The type of sublevel found in all principle energy levels is the ____ sublevel.

Answer 37

S

Question 38

Which is the correct electron configuration of aluminum (atomic number 13)?

Answer 38

1S^2 2S^2 2P^6 3S^2 3P^1

Question 39

How many neutrons does the isotope 125 over 52 Te have?

Answer 39

73

Question 40

Naturally occurring silver consists of two isotopes: 51.82% 107 over 47 Ag (106.9051 u) and 48.18% 109 over 47 Ag (108.9047 u). What is the atomic mass of silver?

Answer 40

107.9 u

Question 41

The maximum number of electrons that can be found in any atom's secound principle level is

Answer 41

8

Question 42

Two different isotopes of a single element would have the same number of ________________ but a different number of _______________.

Answer 42

Protons/Neutrons

Question 43

The number of protons in an atoms nucleus is its _________________________

Answer 43

Atomic number