# CHM 1025C: Spring Term 2008 On-Line PreFinal Module 2Corwin Chapters 2 and 3

Enter First Name followed by a space then your Last Name here

Enter First Name followed by a space then your Last Name here for your Partner

## Question 1

Which of the following terms is a metric unit of length?

a) centimeter
b) second
c) gram
d) milliliter
e) none of the above

## Question 2

What is the term for the digits obtained from an instrumental measurement?

a) instrumental digits
b) nonsignificant digits
c) significant digits
d) certain digits
e) none of the above

## Question 3

Which of the following instruments has the least uncertainty?

b) buret, 0.01mL
d) volumetric pipet, 0.1mL
e) hypodermic syringe, 0.001mL

## Question 4

How many significant digits are in the length measurement 100.60 centimeters?

a) 1
b) 2
c) 3
d) 4
e) none of the above

## Question 5

Round off the following measurement to three significant digits: 35.35mL.

a) 35.30 mL
b) 35.4 mL
c) 35.3 mL
d) 35.0 mL
e) 35.40 mL

## Question 6

Subtract 0.25 g from 31.116 g and round off the answer.

a) 30.9 g
b) 30.8 g
c) 31 g
d) 30.87 g
e) 30.866 g

## Question 7

Express 100,000,000,000,000,000,000 in exponential form.

a) 1 x 10-18
b) 1 x 1020
c) 1 x 1018
d) 1 x 10-20
e) none of the above

## Question 8

The radius of a carbon atom is 0.000 000 000 077 meter. Express the atomic radius in scientific notation.

a) 7.7 x 10-10 m
b) 7.7 x 10-9 m
c) 7.7 x 10-11 m
d) 7.7 x 109
e) 7.7 x 1010 m

## Question 9

Which of the following unit factors is derived from: 1 gram = 15.4 grains?

a) 15.4 grams/1 grain
b) 1 gram/1 grain
c) 1 grain/15.4 grams
d) 15.4 grains/1 gram
e) 15.4 grams/15.4 grains

## Question 10

What is the first step in the unit analysis method of problem solving?

a) write down the given value related to the answer
b) apply a unit factor to convert a unit in the given value
c) round off the answer in the calculator display
e) none of the above

## Question 11

Which of the following is a unit that expresses the volume occupied by a cube 1 centimeter on a side?

a) mm2
b) mm3
c) cm3
d) cm2
e) none of the above

## Question 12

What is the symbol for the metric unit microliter?

a) ML
b) mL
c) cL
d) uL
e) none of the above

## Question 13

If a computer chip switches off-on-off in 0.015 us, what is the switching time in nanoseconds?

a) 15,000 ns
b) 0.000 000 015 ns
c) 0.000 015 ns
d) 15 ns
e) none of the above

## Question 14

A piece of tin foil has a volume of 0.0645 mm3. If the piece measures 10.0 mm by 12.5 mm, what is the thickness of the foil?

a) 0.000 516 mm
b) 80.6 mm
c) 0.0516 mm
d) 194 mm
e) 0.005 16 mm

## Question 15

A 10.0 mL volume of mercury has a mass of 0.136 kg. What is the density of mercury in grams per milliliter?

a) 7.35 g/mL
b) 13.6 g/mL
c) 136 g/mL
d) 73.5 g/mL
e) 1.35 g/mL

## Question 16

What are the freezing point and boiling point of water on the Kelvin scale?

a) 100 K and 273 K
b) 100 K and 373 K
c) 0 K and 273 K
d) 0 K and 100 K
e) 273 K and 373 K

## Question 17

A rare metal alloy is a superconductor at -225C. What is the temperature on the Kelvin scale?

a) -225 K
b) 498 K
c) -498 K
d) -48 K
e) 48 K

## Question 18

Which of the following are basic units and symbols in the metric system?

a) centimeter (cm), gram (g), milliliter (mL)
b) meter (m), gram (g), liter (L)
c) The metric system does not have basic units.
d) meter (m), gram (g), liter (l)
e) centimeter (cm), gram (g), liter (L)

## Question 19

The distance from Earth to the Sun is 3.11 x 108 km. What is the astronomical distance expressed in gigameters? (Given: 1Gm = 1 x 1012 m)

a) 3.11 x 1017 Gm
b) 3.11 x 102 Gm
c) 3.11 x 106 Gm
d) 3.11 x 1014 Gm
e) 3.11 x 10-1 Gm

## Question 20

An economy car has an EPA highway mileage rating of 22km/L. What is the mileage rating in miles per gallon? (Given: 1 mi = 1.61 km, and 1 gal = 3.78 L)

a) 9.4 mi/gal
b) 130 mi/gal
c) 52 mi/gal
d) 35 mi/gal
e) 3.6 mi/gal

I have

Please add a comment below if you found an error on this test or have some other comment

When you have completed this quiz, press the ALL DONE-CHECK TEST button below to check the test! Then you may go back and change the incorrect answers before you submit the test. You may check the answers as many times as you need until you achieve a perfect grade. Sometimes the pop-up box does not appear when you click on the button after checking the test the first time. If this happens, minimize the test and the answer box will be behind the browser. close the box and maximize the test to continue checking the test and finally submitting it.

When you have finished checking the test, press the SUBMIT button to send answers to your instructor

Back to CHM 1025C Course Menu Page

Users whose browser does not support JavaScript, when you have completed this quiz click the submit button below to send answers to your instructor