AOP Chemistry: Measurement and Analysis - Quiz 2 - Precision, Significant Figures, and Scientific Notation

Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. 61,103 = _____

6.1103 x 10^4

Express as an ordinary number. 6.983 x 10^4 =

69,830

Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. (6.0 x 10^4 ) (3.1 x 10^-1 ) = _____

1.9 x 10^4

Give the number of significant figures in this number: 40.00

4

Read the volume of fluid in the graduated cylinder above.

8.7 mL

Give the number of significant figures in this number: 7.8 x 10¹²

2

The unknown sample has a mass of:

90.496 g

Can you measure tenths of a gram with confidence using this balance?

yes

Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. (1.8 x 10^-2 ) ÷ (9 x 10^2 ) = _____

2 x 10^-5

Give the number of significant figures in this number: 0.025

2

Give the number of significant figures in this number: 0.070

2

Express as an ordinary number. 3.85 x 10^-3 =

0.00385

What is the smallest division on this balance?

0.1 g

Give the number of significant figures in this number: 40

1

Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. 0.01325 = _____

1.325 x 10^-2

Which of the following could be a correct measurement using the full precision available for this balance?

24.00 g

Give the number of significant figures in this number: 0.115

3

Give the number of significant figures in this number: 2.110

4

Give the number of significant figures in this number: 2.115

4

Read the volume of fluid in the graduated cylinder above.

68 mL

The number 7.325 rounded off to three significant figures is

7.33

Measure the length of the line within the amount of uncertainty allowed.

Line A: 3.60 cm Line B: 22.0 mm Line C: 1.25 cm Line D: 7.0 mm