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Chem CP Unit 1 Safety and Measurements

Total questions: 147

Worksheet time: 3hrs 41mins

Name
Class
Date
1.

Read every lab carefully (a)   coming to class.

2.

When testing for odors, use a (a)   motion to direct the odors to your nose. Never smell any chemical unless instructed to do so.

3.

When mixing an acid and water, always add the ____________________ to the ____________________.

(a)  

4.

Only certain types of glassware, such as ____________________ or ____________________, are suitable for heating.

(a)  

5.

Allow plenty of time for hot glass to cool before touching it. Hot glass can cause painful burns and it doesn't (a)   hot.

6.

Never look into the mouth of a container that is being (a)   .

7.

Small acid spills can be neutralized with a base, such as sodium hydrogen carbonate (____________________ ____________________).

(a)  

8.

Identify the meaning of the following safety symbols.

a)

a) Flammable

b)

b) Toxic

c)

c) Corrosive

d)

Eye Safety

9.

Identify the meaning of the following safety symbols.

a)

a) Flammable

b)

b) Toxic

c)

c) Corrosive

d)

Fumes

10.

Identify the meaning of the following safety symbols.

a)

a) Flammable

b)

b) Toxic

c)

c) Corrosive

d)

Open Flames

11.

Identify the name of the following pieces of lab equipment.

a)

a) Tongs

b)

b) Beaker

c)

c) Crucible tongs

d)

Striker

12.

Identify the name of the following pieces of lab equipment.

a)

a) Tongs

b)

b) Beaker

c)

c) Crucible tongs

d)

Erlenmeyer Flask

13.

Identify the name of the following pieces of lab equipment.

a)

a) Tongs

b)

b) Beaker

c)

c) Crucible tongs

14.

A sample contains 430 mg of mercury. How many significant figures are in the number?

a)

1

b)

2

c)

3

d)

4

15.

How many significant figures are in 4308?

a)

2

b)

3

c)

4

d)

5

16.

How many significant figures are in 0.00500?

a)

2

b)

3

c)

4

d)

5

17.

Calculate the answer to the following with the correct number of significant figures: 76.4 × 180.4 = ?

a)

13780

b)

13776

c)

13779

d)

13777

18.

Round 4.7475 to 4 significant figures.

a)

4.748

b)

4.747

c)

4.750

d)

4.746

19.

Calculate and give the answer using the correct number of significant figures: 1.02 + 8.2 + 3.33 + 9.781

a)

22.3

b)

22.33

c)

22.331

d)

22.332

20.

Calculate and give the answer using the correct number of significant figures: 1.2 + 3 + 9.65 + 10.881

a)

24.731

b)

24.73

c)

24.7

d)

25

21.

Calculate the answer to the following with the correct number of significant figures: 934.9 ÷ 0.0455 = ?

a)

20500

b)

20540

c)

20530

d)

20520

22.

Round 0.01299 to 3 significant figures.

a)

0.0130

b)

0.0129

c)

0.013

d)

0.012

23.

Write the following number in standard form of scientific notation: 118000

a)

1.18 x 10^5

b)

11.8 x 10^4

c)

118 x 10^3

d)

1.18 x 10^4

24.

Write the following number in standard form of scientific notation: 0.0000085

a)

8.5 x 10^(-6)

b)

8.5 x 10^(-5)

c)

0.85 x 10^(-6)

d)

85 x 10^(-7)

25.

Write the following number in standard form of scientific notation: 0.0000006640

a)

6.64 x 10^-7

b)

6.64 x 10^-6

c)

6.64 x 10^-8

d)

6.64 x 10^-9

26.

Write the following number in standard form of scientific notation: 87200.

a)

8.72 x 10^4

b)

87.2 x 10^3

c)

872 x 10^2

d)

0.872 x 10^5

27.

Write the following number in standard form of scientific notation: 3400.5 x 1011

a)

3.4005 x 1014

b)

3.4005 x 1012

c)

3.4005 x 1011

d)

3.4005 x 1013

28.

Write the following number in standard form of scientific notation: 890.30 x 10-7

a)

8.903 x 10^-5

b)

8.903 x 10^-6

c)

8.903 x 10^-7

d)

8.903 x 10^-8

29.

Write the following number in standard form of scientific notation: 0.0000870 x 1011

a)

8.70 x 106

b)

8.70 x 107

c)

8.70 x 108

d)

8.70 x 109

30.

Take the following number out of scientific notation: 3400.5 x 103

a)

3,400,500

b)

34,005

c)

3,400,500,000

d)

34,005,000

31.

Take the following number out of scientific notation: 100.2 x 10-6

a)

0.0001002

b)

0.001002

c)

0.01002

d)

0.00001002

32.

What is the density (g/mL) of a sample of mineral oil if 250 mL has a mass of 230 g?

a)

0.92 g/mL

b)

1.00 g/mL

c)

0.85 g/mL

d)

1.10 g/mL

33.

The density of mercury is 13.6 g/mL. What is the volume of 72 grams of mercury?

a)

5.29 mL

b)

5.15 mL

c)

5.00 mL

d)

5.44 mL

34.

The density of silver is 10.5 g/cm3. If a pure silver coin has a volume of 45 cm3, what is its mass?

a)

472.5 g

b)

450 g

c)

10.5 g

d)

4.29 g

35.

A platinum bar measures 5.0 cm long, 4.0 cm wide, and 1.5 cm thick. It has a mass of 700.0 grams. Calculate the density of the platinum bar.

a)

23.33 g/cm³

b)

21.00 g/cm³

c)

19.44 g/cm³

d)

18.67 g/cm³

36.

A length of glass tubing is 52.5 cm. How many inches long is the tubing? (2.54 cm = 1 inch)

a)

20.67 inches

b)

21.26 inches

c)

22.05 inches

d)

23.15 inches

37.

How many hours are in a fortnight (2.00 weeks)? (1 week = 7 days; 1 day = 24 hours)

a)

168 hours

b)

336 hours

c)

504 hours

d)

672 hours

38.

On average, there are 11.00 pages in every chapter of an author’s novel. Each book has approximately 14.0 chapters. The author has published 8.00 books. How many pages has she written?

a)

1232

b)

1234

c)

1240

d)

1236

39.

Mark McGuire hit 70 home runs in the 1998 season. Given that there are 4 bases with 90.0 feet between each base, how many miles did he run in this season just from home runs? (5280 ft = 1 mile)

a)

4.77 miles

b)

5.30 miles

c)

6.00 miles

d)

7.50 miles

40.

How many inches are there in a football field (100. yards)? (1 yard = 3 ft; 1 ft = 12 in)

a)

3600 inches

b)

1200 inches

c)

43200 inches

d)

36000 inches

41.
All chemicals in the lab are to be considered dangerous
a)
True
b)
False
42.

You are heating a substance in a test tube. Always point the open end of the test tube ________.

a)

Toward yourself.

b)

Toward your lab partner.

c)

Toward another classmate.

d)

Away from all people.

43.

Food or ______ are not allowed in the science classroom unless it is part of the lab itself.

a)

papers

b)

pencils

c)

gum

d)

water

44.

Horseplay, practical jokes, or pranks in the classroom are

a)

not dangerous.

b)

okay if you are working alone.

c)

always against the rules.

d)

okay.

45.

If you do not understand a direction or part of a laboratory procedure, you should

a)

ask the teacher before proceeding.

b)

skip it and go on to the next part.

c)

figure it out as you do the lab.

d)

try several methods until something works.

46.
The proper technique for smelling chemicals is ______________
a)
keeping your nose close to the glassware
b)
wafting
c)
to sniff only a small amount
d)
Trick question; you never are allowed to smell chemicals in class
47.
The proper technique for smelling chemicals is ______________
a)
keeping your nose close to the glassware
b)
wafting
c)
to sniff only a small amount
d)
Trick question; you never are allowed to smell chemicals in class
48.

When handling chemicals that emit fumes, what safety equipment must be used to avoid inhalation?

a)

Lab coat

b)

Safety goggles

c)

Fume hood

d)

Gloves

49.
Miriam is investigating the reaction between magnesium metal with oxygen in the laboratory. What safety issues should Miriam be aware of? 
a)
Magnesium metal is not very reactive. Miriam should only wear an apron to protect her clothes from spills. 
b)
The reaction will produce carbon monoxide, a toxic gas. 
c)
Magnesium is very reactive with oxygen. Miriam should wear goggles, gloves, and an apron. 
d)
Water will be produced. She will need a beaker to collect the liquid. 
50.
All chemicals are to be considered dangerous in the lab. Do not taste the chemicals. 
a)
True
b)
False
51.

What is not allowed during lab time?

a)

Pranks

b)

Asking for help

c)

Working as a team at your table

d)

Having fun

52.

If a lab accident results in a chemical spill, what is the first step you should take according to standard emergency procedures?

a)

Clean the spill immediately to prevent slipping

b)

Evacuate the area and alert others in the lab

c)

Try to neutralize the chemical with another chemical

d)

Open windows to ventilate the area

53.

Which piece of safety equipment is essential for protecting your eyes from chemical splashes?

a)

Safety goggles

b)

Face shield

c)

Lab coat

d)

Gloves

54.

What type of fire extinguisher should be used for electrical fires in the lab?

a)

Water fire extinguisher

b)

Foam fire extinguisher

c)

Carbon dioxide fire extinguisher

d)

Wet chemical fire extinguisher

55.

(True or False) Horse playing is allowed in the laboratory

a)

true

b)

false

56.

What safety precaution is essential when performing the flame test?

a)

Wearing gloves

b)

Using a fume hood

c)

Wearing safety goggles

d)

Wearing a lab coat

57.

(True or False) Horse playing is allowed in the laboratory

a)

true

b)

false

58.

Chipped or cracked glassware is okay to use in the laboratory.

a)

True

b)

False

59.

You are heating a piece of glass and now want to pick it up. You should

a)

use a rag or paper towels.

b)

pick up the end that looks cooler.

c)

use tongs.

d)

pour cold water on it.

60.

When you finish working with chemicals, biological specimens, etc., always

a)

treat your hands with skin lotion.

b)

wash your hands thoroughly with soap and water.

c)

wipe your hands on a towel.

d)

wipe your hands on your clothes.

61.

What is not allowed during lab time?

a)

Pranks

b)

Asking for help

c)

Working as a team at your table

d)

Having fun

62.
Helping to clean up the lab or classroom is the job of
a)
old students.
b)
transfer students.
c)
each and every student.
d)
only the teacher.
63.

in the lab, you should NEVER

a)

taste substances being used

b)

wear your goggles

c)

pull your hair up if its long

d)

wear close-toed shoes

64.

If a laboratory fire erupts, immediately _________.

a)

Run for the fire extinguisher.

b)

Notify your instructor.

c)

Throw water on the fire.

d)

Open the windows.

65.

(True or False) Horse playing is allowed in the laboratory

a)

true

b)

false

66.
How many sig figs are there?
0.00400
a)
1
b)
3
c)
5
d)
6
67.

Which of the following numbers has the least number of significant figures?

a)

0.0070

b)

700

c)

7.00

d)

0.070

68.

If you multiply 2.501 by 3.2, how many significant figures should the answer have?

a)

2

b)

3

c)

4

d)

5

69.
How many sig figs are there?
4000.
a)
1
b)
3
c)
4
70.
All of the following have one significant figure except:
a)
100 cm
b)
0.0001 cm
c)
2 cm
d)
2.00 cm
71.

What is the mass, in grams, of 30.0 mL of a liquid if its density is 0.60 g/mL?

a)

5.0 g

b)

18 g

c)

5 g

d)

180 g

72.
Which is a measurement of the amount of matter in an object?
a)
mass
b)
volume
c)
weight
d)
conductivity
73.
A set of data are all close to each other, but they are not close to the actual value.  This set of data can be described as...
a)
accurate
b)
precise
c)
both precise and accurate
74.

Calculate the volume of gold in a sample with a mass of 3.0 grams. (a)   Express your answer to the correct number of SIG FIGS.

75.

Water's density is 1.00 g/mL.

If you take three measurements and get 1.50 g/mL, 1.52 g/mL, and 1.49 g/mL, your measurements would be...

a)

Both accurate and precise.

b)

Accurate, but not precise.

c)

Precise, but not accurate.

d)

Neither accurate nor precise.

76.
Which length is the longest?
a)
10 m
b)
2,000 dm
c)
1 km
d)
100,000 mm
77.
6,000 milliliters = ______ liters
a)
60
b)
600
c)
6
d)
6,000
78.

Based on the photo, what is the volume of the liquid?

a)

35.0 mL

b)

24.0 mL

c)

25.0 mL

d)

30.0 mL

79.

How close a measurement is to the true value is called..

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

80.

How close a measurement is to the true value is called..

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

81.

Measurements: 12.3, 14.5, 10.1, 16.9

True Value: 25.0

These measurements are…

a)

Accurate, but not precise

b)

Precise, but not accurate

c)

Both precise and accurate

d)

Neither precise nor accurate

82.

How close a measurement is to the true value is called..

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

83.
You place a rock on the electronic balance an it measures a mass of 12.38 g.  The estimated digit is....
a)
1 
b)
2
c)
3
d)
8
84.

The base measurement for mass is...

a)

kilogram

b)

liters

c)

grams

d)

meters

85.
Accuracy is defined as
a)
close repeated measurements
b)
awesome measurements
c)
really good guessing
d)
measurement near the true value
86.

A measure of volume

a)

molarity

b)

grams

c)

moles

d)

liters

87.
You drop a pencil into a garduated cylinder filled with 90 mL of water. The water rises to 108 mL. What is the volume of the pencil?
a)
12 mL
b)
20 mL
c)
18 mL
d)
198 mL
88.

A measure of mass

a)

molarity

b)

grams

c)

moles

d)

volume

89.
It is a measure of how close measurements come to each other when they are made in the same way
a)
Accuracy
b)
Precision
c)
Error
d)
Extrapolation
90.

The unit for mass is

a)

g or Kg

b)

J

c)

J/gC

d)

°C\degree C

91.
When a measurement is repeatable and consistent it is said to have...
a)
High precision
b)
Low precision
c)
High accuracy
d)
Low accuracy
92.
The ability to hit the desired target is called
a)
Accuracy
b)
Precision
93.
It is a measure of how close measurements come to each other when they are made in the same way
a)
Accuracy
b)
Precision
c)
Error
d)
Extrapolation
94.

The closeness of a measurement to its true value is a measure of its ___.

a)

precision

b)

accuracy

c)

reproducibility

d)

usefulness

95.

How close a measurement is to the accepted value is called..

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

96.

what is the SI unit of pressure?

a)

mole

b)

pascal

c)

newton

d)

joule

97.
What is the proper order of the following metric units from largest to smallest?
a)
km, m, cm, dm, mm
b)
km, m, mm, dm, cm
c)
km, dm, m, cm, mm
d)
km, m, dm, cm, mm
98.
Solve and give your answer with the correct number of significant figures
(12.470)(271)
a)
3366.9
b)
3.37x103
c)
3400
d)
3370
99.
How many significant figure in 0.007?
a)
4
b)
3
c)
1
d)
0
e)

2

100.
What is the measurement 1042 Liters rounded to 2 significant figures? 
a)
1040 L
b)
1.1 x 103 L
c)
1.0 x 103 L
d)
1050 L
101.

How many significant figures?

1001.00

a)

2

b)

4

c)

6

102.
How many significant figures does the following number have: 0.998005
a)
9
b)
10
c)
6
d)
5
103.

How many significant figures?

0.001010

a)

1

b)

2

c)

3

d)

4

104.

How many significant figures?

1000

a)

1

b)

2

c)

3

d)

4

105.
Round 1009 to three sig figs
a)
100
b)
101
c)
1010
d)
1000
106.
Divide 100.00g / 2.00mL
a)
50 g/mL
b)
5.0 x 101 g/mL
c)
50.0 g/mL
d)
50.00 g/mL
107.
How many significant figures does 10,080 sec have?
a)
3
b)
4
c)
5
d)
6
108.
1900 / 170
a)
11.18
b)
11.2
c)
11
d)
10
109.
It is possible to get the exact measurement of an object.
a)
True
b)
False
110.

How many significant figures are in 1.230?

a)

1

b)

2

c)

3

d)

4

111.
How would you write the number 487 with 2 sig figs?
a)
400
b)
500
c)
490
d)
485
112.
How many significant figures does 10.1 cm have?
a)
1
b)
2
c)
3
d)
4
113.

Report your answer w/ the correct number of sig figs:


12.00 + 15.001 =

a)

27.001

b)

27.00

c)

27.0

d)

27

114.

How many significant figures: 216 moles?

a)

1

b)

2

c)

3

d)

0

115.

How many significant figures: 2.106x1021 atoms?

a)

1

b)

2

c)

3

d)

4

116.
How many sig figs are there?
100.00
a)
1
b)
3
c)
4
d)
5
117.
What is 0.658 rounded to 1 significant figure?
a)
0
b)
0.66
c)
0.6
d)
0.658
118.
The ability to replicate the same results is called
a)
Accuracy
b)
Precision
119.

6. A numerical result is said to have good precision if

a)

a it agrees closely with an accepted value

b)

c it has a small number of significant figures

c)

b repeated measurements agree closely

d)

d it is a large whole number

120.

What is the product of 2.34 and 0.1 to the correct number of significant figures?

a)

0.2

b)

0.23

c)

0.234

d)

0.3

121.

Report your answer w/ the correct number of sig figs:


6.201 + 7.4 + 0.68 + 12.0 =

a)

26.281

b)

26.28

c)

26.2

d)

26.3

122.
How many significant figures does the following number have: 100.00210
a)
7
b)
8
c)
10
d)
Ambiguous: 7 or 8
123.

How many significant figures are in the following number?

34.900

(a)  

124.
Solve and give your answer with the correct number of significant figures
24.28 + 12.5
a)
3.687 x 101
b)
36.8
c)
37
d)
3.70x101
125.
Calculate 923 g ÷ 20312 cm3 and give your answer with the correct number of significant figures.
a)
0.04 g/cm3
b)
0.045 g/cm3
c)
0.0454 g/cm3
d)
0.05 g/cm3
126.

How many significant figures: 153.0 L

a)

1

b)

2

c)

3

d)

4

127.

How many significant figures: 0.012 grams

a)

1

b)

2

c)

3

d)

4

128.
How many significant figures does the following number have: 0.00204
a)
6
b)
4
c)
3
d)
2
129.

When measuring the mass of a metal, the balance says 2.00 grams. How many significant figures should you write down?

a)

2

b)

3

c)

4

d)

1

130.
Calculate 7.987 m - 0.54 m and give your answer with the correct number of significant figures.
a)
7.45 m
b)
7.447 m
c)
7.4 m
d)
7.5 m
131.

How many significant digits in the number 4500.0?

a)

4

b)

5

c)

3

d)

2

132.

What is the result of 1.2 + 1.23 + 1.234 to the correct number of significant figures?

a)

3.7

b)

3.664

c)

3.6

d)

3.66

133.

If you multiply 2.501 by 3.2, how many significant figures should the answer have?

a)

2

b)

3

c)

4

d)

5

134.

Which of the following numbers has the least number of significant figures?

a)

0.0070

b)

700

c)

7.00

d)

0.070

135.

When subtracting 100.0 from 99.95, the correct way to express the result with significant figures is:

a)

0.05

b)

0.1

c)

0.050

d)

0.10

136.

How many significant figures should the result of 5.002.0\frac{5.00}{2.0} have?

a)

1

b)

2

c)

3

d)

4

137.

How many significant figures are in the number 0.00420?

a)

2

b)

3

c)

4

d)

5

138.

When adding 123.45 and 0.0034, the result should be rounded to how many decimal places?

a)

1

b)

2

c)

3

d)

4

139.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
140.
How many significant figures does the following number have: 0.002040
a)
4
b)
3
141.
How many Significant Figures in the number below?
4.56 x 103
a)
5
b)
4
c)
6
d)
3
142.
Solve and give your answer with the correct number of significant figures
129.6/3
a)
43.0
b)
43
c)
 4x101
d)
40
143.
How many significant figures does the following number have: 100.00210
a)
7
b)
5
c)
10
d)
8
144.

How many significant figures are in the following number?

0.00034030

(a)  

145.

How many significant figures does the following number have?1.2500 x 10310^3  

a)
5
b)
3
c)

Ambiguous: 3 or 5

d)

7

146.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
147.

You are required to wear goggles when ________.

a)

chemicals are used.

b)

heated glass is used.

c)

working with fire.

d)

chemicals, heated glass, or fire are being used.

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