Significant Figures in Analytical Chemistry

How many significant figures are in the number 0.00345?

• 5

• 3

• 4

• 2

Perform the following addition with correct sig figs: 12.345 + 6.7

• 18.0

• 19.0

• 19.5

• 20.0

What is the result of multiplying 2.3 by 4.56 with the correct number of sig figs?

• 9.99

• 10.1

• 10

• 8.5

Why is it important to consider significant figures when reporting analytical results?

• To confuse the audience

• To indicate the precision and uncertainty of the measurement.

• To make the results seem more impressive

• To waste time

Perform the following division with the correct number of sig figs: 8.91 ÷ 2.3

• 3.87

• 4.25

• 3.08

• 3.87

How many significant figures are in the number 5000?

• 4

• 3

• 2

• 1

What is the result of adding 123.4 and 56.789 with the correct number of sig figs?

• 179.999

• 236.123

• 200.0

• 180.189

In the measurement 0.0072 g, how many significant figures are there?

• 2

• 5

• 4

• 3

Perform the following multiplication with the appropriate number of sig figs: 3.2 x 1.45

• 4.6

• 4.7

• 4.8

• 4.5

Why is it necessary to round off the final answer to the correct number of significant figures?

• It ensures the precision of the result matches the precision of the input data.

• It is a tradition in mathematics

• To confuse the reader

• It makes the answer look longer