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Review: Measurement and Sig Figs

Review: Measurement and Sig Figs

Assessment

Presentation

Chemistry

10th - 12th Grade

Medium

NGSS
MS-PS1-1

Standards-aligned

Created by

Kimberly OReilly

Used 23+ times

FREE Resource

12 Slides • 25 Questions

1

Review: Measurement and Sig Figs

by Kimberly O'Reilly

2

An element contains just one type of atom. Elements can NOT be broken down. ​

​Compounds contain 2 or more different atoms chemically bonded. Compounds can be decomposed chemically.

Elements vs. Compounds

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3

Multiple Choice

Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is ---

1

a gas at room temperature.

2

made of two different elements.

3

given off by green plants.

4

useful to human beings

4

Multiple Choice

Is sugar (C12H22O11) an element or a compound?
1
Element
2
Compound

5

​Element Symbols!

Know your element symbols! See pages 3-4 in the Matter and Measurement packet for the list!

6

Multiple Choice

What is the element symbol for Krypton?

1

K

2

Kr

3

P

4

Pr

7

Multiple Choice

What is the element symbol for mercury?

1

Mo

2

Ag

3

Au

4

Hg

8

Multiple Choice

What is the element symbol for lead?

1

Po

2

Li

3

Hg

4

Pb

9

Multiple Choice

What is the element symbol of Phosphorus?

1

P

2

K

3

Pt

4

Po

10

​Making Measurements w Sig Figs

​Be sure to read all of the digits (numbers) from the measuring device and then estimate one digit (number)!

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11

Multiple Choice

Question image

Which is a correct measurement made with the measuring device shown? 

1

1.3 cm

2

1.36 cm

3

1 cm

4

1.030 cm

12

Multiple Choice

Question image

Which is a correct measurement made with the measuring device shown? 

1

4.5 cm

2

4.50 cm

3

4.0 cm

4

4 cm

13

Multiple Choice

Question image

Which is a correct measurement made with the measuring device shown? 

1

20 mL

2

21 mL

3

21.60 mL

4

21.6 mL

14

​Determining the number of sig figs in a measurement . . .

​Use your "zero" rules!

  • ​Nonzero digits always significant!

  • ​In between zeros always significant!

  • ​Trailing zeros only significant when a decimal point is present!

  • ​Leading zeros are never significant!

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15

​Determining the number of sig figs in a measurement . . .

​Use your Atlantic-Pacific Rule!

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16

Multiple Choice

How many significant figures does the measurement 10.1 cm have?

1

1

2

2

3

3

4

0

17

Multiple Choice

How many significant figures does the measurement 0.010 cm have?

1

1

2

2

3

3

4

4

18

Multiple Choice

How many significant figures does the measurement 10,080 sec have?

1

2

2

3

3

4

4

5

19

Multiple Choice

How many significant figures does the measurement 1.90 × 108 grams have?

1

1

2

2

3

3

4

4

20

Multiple Choice

How many significant figures does the measurement 0.040170 L have?

1

4

2

5

3

6

4

7

21

​Calculations with Sig Figs

​Know your rules for adding/subtracting and multiplying/dividing!

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22

​Calculations with Sig Figs

​Know your rules for adding/subtracting and multiplying/dividing!

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23

​Density Calculations

​The formula for calculating density is on Reference Table T!

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24

Multiple Choice

Perform the calculation to the correct number of significant figures with the correct unit.

12.34 g + 1.234 g + 0.1234 g =

1

13.7 g

2

13.70 g

3

13.697 g

4

13.6974 g

25

Multiple Choice

Perform the calculation to the correct number of significant figures with the correct unit.

12.34 cm × 1.234 cm × 0.1234 cm=

1

1.8790809 cm3

2

1.879081 cm3

3

1.9 cm3

4

1.879 cm3

26

Multiple Choice

Question image

Calculate the volume of the cube to the correct number of significant figures. Assume units are cm. 

1

144 cm3

2

100 cm3

3

140 cm3

27

Multiple Choice

A sample of copper has a mass of 89.57 grams and a volume of 10.0 mL. Calculate the density of the copper sample to the correct number of sig figs and with the correct unit!

1

8.96 g/mL

2

8.957 g/mL

28

Multiple Choice

Question image

What is the volume of object X to the correct number of significant figures?

1

25 mL 

2

25.0 mL

3

65.0 mL

4

90.0 mL

29

Multiple Choice

Question image

If the mass of Object X is 100.00 grams, its density is . . .

1

4 g/mL

2

4.0 g/mL

3

4.00 g/mL

4

4.000 g/mL

30

Multiple Choice

Perform the calculation to the correct number of significant figures with the correct unit.

The density of platinum is 21.45 g/cm3. How much space would a 107.25 g sample of platinum take up?

1

2301 cm3

2

0.2000 cm3

3

5.000 cm3

4

5.0 cm3

31

​Accuracy vs. Precision

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32

​Percent Error Calculations

​The formula for calculating % error is on Reference Table T!

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33

Multiple Choice

Liam uses a thermometer and finds the boiling point of ethyl alcohol to be 75.0o C.  He looks in Mrs. O'Reilly's Handbook of Chemistry and Physics and finds that the actual boiling point of ethyl alcohol is 80.0oC.  What is his percent error?

 

1

6.25%

2

6.3%

3

25%

4

25.0%

34

Multiple Choice

A student measures the mass of a sample as 25.00 grams in chemistry lab. What is this mass expressed in milligrams?

1

0.02500 mg

2

2.500x104mg

3

0.2500 mg

4

2.500x103 mg

35

​1) Set up conversion factor with units.
2) Place a 1 in front of the larger unit.
3) Place a 1 in front of the smaller unit and add the number of zeros that separate the two units on a number line.
4) Perform the math!

Metric Conversions using Dimensional Analysis

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36

Multiple Choice

Convert 4.17 Liters to milliliters.

1

0.00417 mL

2

41.7 mL

3

4,170 mL

4

41,700 mL

37

Multiple Choice

Convert 12.28 grams to kilograms.

1

12,280 kg

2

0.01228 kg

3

12,280 kg

4

0.1228 kg

Review: Measurement and Sig Figs

by Kimberly O'Reilly

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