Chemistry Quiz 2: Precision, Significant Figures, and Scientific Notation
Give the number of significant figures in this number: 7.8 x 10¹²
2
Read the volume of fluid in the graduated cylinder above. Hint: Note that each interval is equal to 0.2 mL. 8.7 mL 8.9 mL 8.8 mL 9 mL
8.7 mL
Read the volume of fluid in the graduated cylinder above. 68 mL 68.0 mL 69 mL 69.0 mL
68 mL
Express as an ordinary number. 6.983 x 10^4=
69,830
The number 7.325 rounded off to three significant figures is
7.33
The unknown sample has a mass of: 91.490 g 90.496 g 90.4 g 94.459 g 95.495 g
90.496 g
Measure the length of the line within the amount of uncertainty allowed. (Note: You may need to convert centimeters to millimeters in your response.)
A = 3.60 cm B = 22.0 mm C = 1.25 cm D = 7.0 mm
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 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 2.0 x 10^-5 0.2 x 10^-4
2 x 10^-5
Give the number of significant figures in this number: 40
1
Give the number of significant figures in this number: 0.115
3
Express as an ordinary number. 3.85 x 10^-3=
0.00385
What is the smallest division on this balance? 0.005 g 0.001 g 0.01 g 0.1 g
0.1 g
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 1.0 x 10^-2 1.3 x 10^-2
1.325 x 10^-2
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) = _____ 1.86 x 10^4 1.9 x 10^4 1.8 x 10^4
1.9 x 10^4
Which of the following could be a correct measurement using the full precision available for this balance? 24.0 g 24.00 g 24 g 24.0000 g
24.00 g
Give the number of significant figures in this number: 2.110
4
Give the number of significant figures in this number: 2.115
4
Give the number of significant figures in this number: 40.00
4
Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. 61,103 = _____ 6.11 x 10^4 6.1103 x 10^4 6 x 10^4
6.1103 x 10^4
Can you measure tenths of a gram with confidence using this balance? yes no
Yes
