Chemistry Unit 1
Express in scientific notation. Remember, M must be a number such that 1 ≤ M < 10. 0.000543 = _____
5.43*10e-4
Give the number of significant figures: 13,436.0 mm
6
Give the number of significant figures: 369,132,000 sec
6
Round 6.362 cg to 3 significant figures:
6.36
accuracy
correctness of a measurement
precision
degree of exactness of a measurement
Round 0.0952 km to 2 significant figures:
0.095
Multiply and round to the proper number of significant figures. (0.234 cm)(3.53 cm) =
0.826
Give the number of significant figures: 0.011 cm
2
Round 23.455 cm to 4 significant figures:
23.46
3 x 100e0 =
3
Give the number of significant figures: 0.882 mm
3
Give the number of significant figures: 3.10 cm
3
Give the number of significant figures: 6.32 g
3
Give the number of significant figures: 832,000 km
3
Express in scientific notation. Remember, M must be a number such that 1 ≤ M < 10. 32,400 = _____
3.24*10e4
Give the number of significant figures in this number: 40.00
4
Give the number of significant figures: 0.01101 cm
4
Give the number of significant figures: 7.110 g
4
Give the number of significant figures: 92.06 kg
4
How many significant figures should the following answer have? (23.34 cm)(90076 cm)(2.1223 cm) = _____
4
Round 0.0645 g to 2 significant figures:
0.065
Express in scientific notation. Remember, M must be a number such that 1 ≤ M < 10. 0.00000000000013 = _____
1.3*10e-13
Multiply and round to the proper number of significant figures. (896.5 cm)(12 cm) =
11,000
Give the number of significant figures in this number: 0.070
2
Accuracy is the correctness of a measurement.
True
Precision is related to the uncertainty in a measurement.
True