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