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CHM 1025C: On-Line Practice Final-Long Form

Module Two: ChemMath & Measurements

Module 2 Test Masters:

Carla Irven-Ciccone[Test Input]

John Taylor (johtaylo@fscj.edu) [Template Author]


Multiple Choice [Chapters 2 and 3]


Question 1

Microelectronic technology has produced an instrument that provides an exact measurement for which of the following?

a) length
b) mass
c) volume
d) time
e) No instrument is capable of an extact measurement.

Question 2

How many significant digits are in the length measurement 10.05 meters?

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

Question 3

How many significant digits are in the mass measurement 0.050 gram?

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

Question 4

How many significant digits are in the volume measurement 100.00 milliliters?

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

Question 5

Round off the following measurement to three significant digits: 19.945 g.

a) 19.0 g
b) 19.9 g
c) 19.950 g
d) 19.945 g
e) 10.0 g

Question 6

Round off the following measurement to three significant digits: 1255 g.

a) 125 g
b) 126 g
c) 130 g
d) 1250 g
e) 1260 g

Question 7

Add 25.5 cm to .55 cm and round off to the proper number of significant digits.

a) 26 cm
b) 26.0 cm
c) 26.05 cm
d) 26.1 cm
e) 27 cm

Question 8

Subtract 0.25 cm from 11.5 cm and round off to the proper number of significant digits.

a) 11 cm
b) 11.0 cm
c) 11.2 cm
d) 11.25 cm
e) 11.3 cm

Question 9

Multiply 1.05 cm times 2.2 cm and round off the product to the proper number of significant digits.

a) 2 cm2
b) 2.0 cm2
c) 2.3 cm2
d) 2.31 cm2
e) 3 cm2

Question 10

Divide 2882 meters by 14.575 seconds and round off the quotient to the proper number of significant digits.

a) 197 m/s
b) 197.7 m/s
c) 197.74 m/s
d) 198 m/s
e) 198.0 m/s

Question 11

Express 100,000,000 in exponential form.

a) 1 * 10-9
b) 1 * 10-8
c) 1 * 10-6
d) 1 * 108
e) 1 * 109

Question 12

Express 0.000 001 in exponential form.

a) 1 * 10-6
b) 1 * 10-5
c) 1 * 10-1
d)1 * 105
e) 1 * 106

Question 13

Express the exponential number 1.5 8 10-5 as an ordinary number.

a) 0.000 15
b) 0.000 15
c) 0.000 015
d) 15,000
e) 150,000

Question 14

One cubic centimeter of helium gas contains 26,900,000,000,000,000,000 atoms at standard conditions. Express this number of helium atoms in scientific notation.

a) 2.69 * 1017
b) 2.69 * 1018
c) 2.69 * 1019
d) 26.9 * 1018
e) 26.9 * 1019

Question 15

Which of the following is a unit factor which is derived from the unit equation: 1 yard = 36 inches?

a) 1 yard/1 inch
b) 36 yards/36 inches
c) 36 yards/1 inch
d) 1 yard/36 inches
e) 1 inch/36 yards

Question 16

After carefully reading a problem, what is the first step in the unit analysis method of problem solving?

a) write down the units asked for in the answer
b) write down the given value relevant to the answer
c) write one or more unit equations
d) write the two unit factors associated with each unit equation
e) select and apply one or more unit factors in order to convert the given value to the units of the answer

Question 17

Eighteen karat (18k) gold jewelry contains 18 parts gold and 6 parts silver by mass. What is the percentage of gold in 18k gold jewelry?

a) 6%
b) 18%
c) 25%
d) 33%
e) 75%

Question 18

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

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

Question 19

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

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

Question 20

Which of the following is a unit of metric volume?

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

Question 21

If a marathon race is 26.l2 miles, what is the distance in yards? (Given: 1 mile = 1760 yards)

a) 0.0149 yards
b) 67.2 yards
c) 46,000 yards
d) 46,100 yards
e) 46,110 yards

Question 22

The velocity of light is 1.86 * 105 miles per second. If the sun is 93,000,000 miles from earth, how many minutes does it take for sunlight to reach the earth?

a) 0.0020 minute
b) 2.0 minutes
c) 8.3 minutes
d) 500 minutes
e) 830 minutes

Question 23

Assuming the market price for gold is $450.00 per troy ounce, what is the value of one gram of gold? (Given: 12 troy oz = 1 troy lb and 1 troy lb = 373 g)

a) $0.10
b) $14.48
c) $450.00
d) $13987.50
e) $2,014,200.00

Question 24

Which of the following is a currently accepted basic unit and symbol in the metric system.

a) meter (m)
b) gram (g)
c) liter (L)
d) all of the above
e) none of the above

Question 25

Which of the following is the best estimate for the volume corresponding to 20 drops from an eyedropper?

a) 1 mL
b) 10 mL
c) 100 mL
d) 1000 mL
e) 10000 mL

Question 26

According to the metric system, 1000 g = 1 ______.

a) cg
b) kg
c) mg
d) Mg
e) ug (u stands for Greek letter Mu)

Question 27

According to the metric system, 1 m = 1000 ______.

a) km
b) cm
c) mm
d) nm
e) um (u = Greek Mu)

Question 28

What is the length in meters of a 20.0 mL test tube that measures 15.0 cm?

a) 0.150 m
b) 0.200 m
c) 1.50 m
d) 1500 m
e) 2000 m

Question 29

What is the mass in kilograms of a 250 mL beaker that weighs 101 g?

a) 0.101 kg
b) 1.01 kg
c) 10.1 kg
d) 1010 kg
e) 101,000 kg

Question 30

Osmium is the most dense element (22.5 g/cm3). What is the mass of 10.0 cm3 of the metal?

a) 0.444 g
b) 2.25 g
c) 22.5 g
d) 225 g
e) 444 g

Question 31

Magnesium is one of the least dense elements (d = 1.74 g/cm3). What is the volume of a 10.0 g sample of the metal?

a) 5.75 cm3
b) 10.0 cm3
c) 17.4 cm3
d) 57.5 cm3
e) 174 cm3

Question 32

A tall glass cylinder contains four separate liquid layers: mercury (d = 13.6 g/mL), chloroform (d = 1.49 g/mL), acetic acid (d = 1.05 g/mL), ether (d = 0.708 g/mL). If ice (d = 0.99 g/mL) is dropped into the cylinder, where does it come to rest?

a) on top of the mercury layer
b) on top of the chloroform layer
c) on top of the acetic acid layer
d) on top of the ether layer
e) on the bottom of the cylinder



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