CHEMISTRY - QUIZ 2: PRECISION, SIGNIFICANT FIGURES, AND SCIENTIFIC NOTATION
Express as an ordinary number. 6.983 x 10 ^4 =
69,830
Express as an ordinary number. 3.85 x 10 ^-3 =
0.00385
21. Give the number of significant figures in this number: 7.8 x 10¹²
2
13. Express in scientific notation, using the proper number of significant figures. (1.8×10−2)÷(9×102)=(1.8×10−2)÷(9×102)=_____
2 x 10 ^−5
The number 7.325 rounded off to three significant figures is
7.33
4. The unknown sample has a mass of: LINK TO IMAGE: https://assets.learnosity.com/organisations/328/4293a8be-29e8-4982-9336-51116e59c8a8/scale.gif
90.496 g
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. 0.01325 = _____
1.325 x 10 ^-2
Give the number of significant figures in this number: 40
1
12. Express in scientific notation, using the proper number of significant figures. (6.0×104)×(3.1×10−1)=(6.0×104)×(3.1×10−1)= _____
1.9 x 1041.9 x 10 ^4
6. Which of the following could be a correct measurement using the full precision available for this balance? LINK TO IMAGE: https://assets.learnosity.com/organisations/328/4293a8be-29e8-4982-9336-51116e59c8a8/balance3.gif
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
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 = _____
6.1103 x 10 ^4
7. Can you measure tenths of a gram with confidence using this balance? LINK TO IMAGE: https://assets.learnosity.com/organisations/328/4293a8be-29e8-4982-9336-51116e59c8a8/balance3.gif
Yes