Sig Fig Sleuths
How many significant figures are in 82.5 g?
Answer: 3
Round 67.382 to 3 significant figures.
Answer: 67.4
Calculate using the correct number of significant figures:
16.38 + 4.7
Answer: 21.1
What term describes how close a measurement is to the accepted value?
Answer: Accuracy
Convert 6.4 kg → g
Answer: 6,400 g
An experimental value is 24.0 g and the accepted value is 25.0 g.
What is the percent error?
Answer: 4.0%
How many significant figures are in 0.003040 L?
Answer: 4
Round 0.006784 to 2 significant figures.
Answer: 0.0068
Calculate using the correct number of significant figures:
72.45 − 8.3
Answer: 64.2
What term describes how close repeated measurements are to one another?
Answer: Precision
Convert 9,300 mg → g
Answer: 9.3 g
An experimental value is 47.5 mL and the accepted value is 50.0 mL.
What is the percent error?
Answer: 5.0%
How many significant figures are in 600.70 mL?
Answer: 5
Round 943,721 to 4 significant figures.
Answer: 943,700
Calculate using the correct number of significant figures:
5.6 × 3.42
Answer: 19
The accepted value is 40.0 g.
A student gets:
40.1 g, 40.1 g, 40.2 g
Are the measurements accurate, precise, both, or neither?
Answer: Both accurate and precise
Convert 3.75 L → mL
Answer: 3,750 mL
An experimental value is 103.0 g and the accepted value is 100.0 g.
What is the percent error?
Answer: 3.0%
How many significant figures are in 0.00050600 kg?
Answer: 5
Round 15.9642 to 4 significant figures.
Answer: 15.96
Calculate using the correct number of significant figures:
46.2 ÷ 3.5
Answer: 13
The accepted value is 65.0 g.
A student gets:
52.4 g, 52.5 g, 52.4 g
Are the measurements accurate, precise, both, or neither?
Answer: Precise but not accurate
Using 1 in = 2.54 cm, convert 18 inches → centimeters
Answer: 45.72 cm
Which experiment is more accurate?
Answer: Experiment A
How many significant figures are in 4,070.00 g?
Answer: 6
Round 0.00087965 to 3 significant figures.
Answer: 0.000880
Calculate using the correct number of significant figures:
(7.25)(2.6) ÷ 1.40
Answer: 13
The accepted value is 100.0 g.
A student gets:
96.2 g, 103.8 g, 99.5 g
Are the measurements accurate, precise, both, or neither?
Answer: Accurate but not precise
Convert 0.062 km → mm
Answer: 62,000 mm
A student obtains an experimental value of 28.6 cm. The accepted value is 30.0 cm.
a. Calculate the percent error.
b. Would you consider the measurement relatively accurate or inaccurate?
Answer:
a. 4.7% error
b. Relatively accurate