Significant Figures and Scientific Notation (CHEM 1405)
Back to Chemistry 1405 Practice Problems
Change the following measurements into scientific notation. Make sure to use correct significant figures.
1) 3,011.0 g __________________
2) 021 mL __________________
3) 128 mg __________________
4) 0.0010 km __________________
5) 840.0 m __________________
6) 130,001.0 m __________________
7) 0.0101 mm __________________
8) 0.900 mg __________________
9) 121.01 mL __________________
10) 100,000 m __________________
11) 30 oz __________________
12) 0.00950 miles __________________
How many significant figures are in each of the following measurements?
13) 7030 g ______
14) 4.0 kg ______
15) 0.060 hr ______
16) 4002 m ______
17) 8200 km ______
18) 0.00705 dm ______
Round off each of the following numbers to 2 significant figures.
19) 115 _________
20) 37,500 _________
21) 0.47322 _________
22) 55.6 _________
23) 1,557,000 _________
Perform the following operations expressing the answer in the correct number of significant figures.
24) 1.35 m x 2.467 m = ______________
25) 55.46 g – 28.9 g = ______________
26) 150 L3 / 4L = ______________
27) 12.01 mL + 35.2 mL +6 mL = ______________
28) 1.252 mm x 1.15 mm x 0.012 mm = ______________