n3 - sig figsmychemistryclass.net/files/honors chem/1 chemistry basics...accuracy refers to the...
TRANSCRIPT
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N3 - Sig Figs
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Uncertainty in Measurement
A digit that must be estimated is called uncertain. A measurement always has some degree of uncertainty.
• Measurements are performed with instruments• No instrument can read to an infinite # of decimal places
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Precision and Accuracy
Accuracy refers to the agreement of a particular value with the true value.
Neither accurate nor precise
Precise but not accurate
Precise AND accurate
Precision refers to the degree of agreementamong several measurements made in the same manner.
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Rules for Counting Sig Figs
Nonzero Integers
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Rules for Counting Sig Figs
Nonzero Integers
ALWAYS COUNT as SIGNIFICANT
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Rules for Counting Sig Figs
Nonzero Integers
ALWAYS COUNT as SIGNIFICANT
3456 has4 sig figs
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Rules for Counting Sig Figs
Leading Zeros
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Rules for Counting Sig Figs
Leading Zeros
NEVER COUNT as SIGNIFICANT
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Rules for Counting Sig Figs
Leading Zeros
NEVER COUNT as SIGNIFICANT
0.0486 has3 sig figs
![Page 10: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/10.jpg)
Rules for Counting Sig Figs
Captive Zeros
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Rules for Counting Sig Figs
Captive Zeros
ALWAYS COUNT as SIGNIFICANT
![Page 12: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/12.jpg)
Rules for Counting Sig Figs
Captive Zeros
ALWAYS COUNT as SIGNIFICANT
16.07 has4 sig figs.
![Page 13: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/13.jpg)
Rules for Counting Sig Figs
Trailing Zeros
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Rules for Counting Sig Figs
Trailing Zeros
SOMETIMES COUNT as
SIGNIFICANT
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Rules for Counting Sig Figs
Trailing Zeros
AFTER A DECIMALALWAYS COUNT as
SIGNIFICANT
SOMETIMES COUNT as
SIGNIFICANT
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Rules for Counting Sig Figs
Trailing Zeros
AFTER A DECIMALALWAYS COUNT as
SIGNIFICANT
SOMETIMES COUNT as
SIGNIFICANT
NO DECIMALNEVER COUNT as
SIGNIFICANT
![Page 17: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/17.jpg)
Rules for Counting Sig Figs
Trailing Zeros
AFTER A DECIMALALWAYS COUNT as
SIGNIFICANT
9.300 has4 sig figs.
SOMETIMES COUNT as
SIGNIFICANT
NO DECIMALNEVER COUNT as
SIGNIFICANT
![Page 18: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/18.jpg)
Rules for Counting Sig Figs
Trailing Zeros
AFTER A DECIMALALWAYS COUNT as
SIGNIFICANT
9.300 has4 sig figs.
SOMETIMES COUNT as
SIGNIFICANT
NO DECIMALNEVER COUNT as
SIGNIFICANT
9300 has2 sig figs.
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Rules for Counting Sig Figs
Exact Numbers
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Rules for Counting Sig Figs
Exact Numbers
INFINITE NUMBER of sig figs
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Rules for Counting Sig Figs
Exact Numbers
INFINITE NUMBER of sig figs
1in = 2.54cm12in = 1ft
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How many significant figures in the following number?
1.0070 m3
2
5
6
4
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How many significant figures in the following number?
1.0070 m3
2
56
4
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How many significant figures in the following number?
17.10 Kg3
4
5
2
None of the above
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How many significant figures in the following number?
17.10 Kg3
45
2
None of the above
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How many significant figures in the following number?
100,890 LNone of the above
4
6
3
5
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How many significant figures in the following number?
100,890 LNone of the above
4
6
3
5
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How many significant figures in the following number?
3.29 x 103 sec4
1
3
5
None of the above
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How many significant figures in the following number?
3.29 x 103 sec4
1
35
None of the above
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How many significant figures in the following number?
0.0054 cm4
5
3
2
None of the above
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How many significant figures in the following number?
0.0054 cm4
5
3
2None of the above
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How many significant figures in the following number?
3,200,0002
7
5
4
3
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How many significant figures in the following number?
3,200,00027
5
4
3
![Page 34: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/34.jpg)
How many significant figures in the following number?
0.00560302
7
5
4
3
![Page 35: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/35.jpg)
How many significant figures in the following number?
0.00560302
7
54
3
![Page 36: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/36.jpg)
Rules for Using Sig Figs
Multiplication & Division
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Rules for Using Sig Figs
Multiplication & Division
Answer based on LEAST number of
SIG FIGS in the problem
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Rules for Using Sig Figs
Multiplication & Division
Answer based on LEAST number of
SIG FIGS in the problem
6.38 x 2.0 =
12.76
![Page 39: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/39.jpg)
Rules for Using Sig Figs
Multiplication & Division
Answer based on LEAST number of
SIG FIGS in the problem
6.38 x 2.0 =3 SF 2SF
12.76 13 (2 sig figs)
![Page 40: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/40.jpg)
Which answer has the correct number of sig figs?
3.24 m x 7.0 m
22.7 m2
23 m2
22.6 m2
2 SF
![Page 41: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/41.jpg)
Which answer has the correct number of sig figs?
3.24 m x 7.0 m
22.7 m2
23 m2
22.6 m2
2 SF
![Page 42: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/42.jpg)
Which answer has the correct number of sig figs?
100.0 g ÷ 23.7 cm3
4.22 g/cm3
4.219 g/cm3
4.2 g/cm3
3 SF
![Page 43: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/43.jpg)
Which answer has the correct number of sig figs?
100.0 g ÷ 23.7 cm3
4.22 g/cm3
4.219 g/cm3
4.2 g/cm3
3 SF
![Page 44: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/44.jpg)
Which answer has the correct number of sig figs?
0.02 cm x 2.371 cm
0.04742 cm2
0.047 cm2
0.05 cm2
1 SF
![Page 45: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/45.jpg)
Which answer has the correct number of sig figs?
0.02 cm x 2.371 cm
0.04742 cm2
0.047 cm2
0.05 cm2
1 SF
![Page 46: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/46.jpg)
Which answer has the correct number of sig figs?
710 m ÷ 3.0 s
240 m/s
236.6 m/s
236 m/s
2 SF 2 SF
![Page 47: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/47.jpg)
Which answer has the correct number of sig figs?
710 m ÷ 3.0 s
240 m/s236.6 m/s
236 m/s
2 SF 2 SF
![Page 48: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/48.jpg)
Rules for Using Sig Figs
Addition & Subtraction
![Page 49: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/49.jpg)
Rules for Using Sig Figs
Addition & Subtraction
Answer based on LEAST number of DECIMAL PLACES
in the problem
![Page 50: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/50.jpg)
Rules for Using Sig Figs
Addition & Subtraction
Answer based on LEAST number of DECIMAL PLACES
in the problem
6.8 + 11.934 =
18.734
![Page 51: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/51.jpg)
Rules for Using Sig Figs
Addition & Subtraction
Answer based on LEAST number of DECIMAL PLACES
in the problem
6.8 + 11.934 =1DP 3DP
18.734
![Page 52: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/52.jpg)
Rules for Using Sig Figs
Addition & Subtraction
Answer based on LEAST number of DECIMAL PLACES
in the problem
6.8 + 11.934 =1DP 3DP
18.734 18.7(3 sig figs)
![Page 53: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/53.jpg)
Which answer has the correct number of sig figs?
3.24 m + 7.0 m
10.24 m
10.2 m
10 m
1 DP
![Page 54: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/54.jpg)
Which answer has the correct number of sig figs?
3.24 m + 7.0 m
10.24 m
10.2 m
10 m
1 DP
![Page 55: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/55.jpg)
Which answer has the correct number of sig figs?
0.02 cm + 2.371 cm
2.4 cm
2.391 cm
2.39 cm
2 DP
![Page 56: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/56.jpg)
Which answer has the correct number of sig figs?
0.02 cm + 2.371 cm
2.4 cm
2.391 cm
2.39 cm
2 DP
![Page 57: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/57.jpg)
Which answer has the correct number of sig figs?
2.030 mL – 1.870 mL
0.16 mL
0.160 mL
0.1600 mL
3 DP 3 DP
![Page 58: N3 - Sig Figsmychemistryclass.net/Files/HONORS CHEM/1 Chemistry Basics...Accuracy refers to the agreement of a particular value with the true value. Neither accurate nor precise Precise](https://reader034.vdocument.in/reader034/viewer/2022043019/5f3b49601de3f3135b243d1b/html5/thumbnails/58.jpg)
Which answer has the correct number of sig figs?
2.030 mL – 1.870 mL
0.16 mL
0.160 mL0.1600 mL
3 DP 3 DP