Significant Figures and Calculations Quiz

Why are significant figures important in scientific data reporting?

• They help in identifying the type of data.

• They indicate the precision of measurements.

• They are used to convert units.

• They simplify complex calculations.

Which of the following numbers has three significant figures?

• 0.0045

• 4.50

• 4500

• 0.0450

What is the rule for counting leading zeros in significant figures?

• They are always significant.

• They are significant only if followed by a decimal.

• They are significant only if they are between non-zero digits.

• They are never significant.

How many significant figures are in the number 0.004560?

• 4

• 3

• 6

• 5

When adding numbers, to how many decimal places should the result be rounded?

• The same number of significant figures as the number with the most significant figures.

• The same number of decimal places as the number with the fewest decimal places.

• The same number of significant figures as the number with the fewest significant figures.

• The same number of decimal places as the number with the most decimal places.

In multiplication, how is the number of significant figures in the result determined?

• By the number with the most decimal places.

• By the number with the fewest significant figures.

• By the number with the fewest decimal places.

• By the number with the most significant figures.

What is the result of 32.232 + 12.2 rounded to the correct number of significant figures?

• 44.44

• 44.43

• 44.4

• 44.432

If you multiply 72.23 by 2.0, how many significant figures should the result have?

• 4

• 2

• 1

• 3

What is the correct way to express 28,000 with one significant figure?

• 28,000

• 28,000.0

• 30,000

• 28,000.00

How should 0.324 be written in a chemistry context?

• .324

• 324

• 3.24

• 0.324