Mastering Significant Figures in Chemistry

What is the primary purpose of significant figures in scientific measurements?

• To measure the accuracy of a number

• To measure the precision of a number

• To measure the size of a number

• To measure the speed of a number

When the decimal is present, from which side do you start counting significant figures?

• From the top

• From the left side

• From the middle

• From the right side

In the number 23.709, how many significant figures are there?

• 4

• 5

• 7

• 6

For the number 0.0200, how many significant figures are counted?

• 1

• 2

• 4

• 3

When the decimal is absent, from which side do you start counting significant figures?

• From the right side

• From the middle

• From the left side

• From the top

In the number 239, how many significant figures are there?

• 4

• 3

• 2

• 1

For the number 4000, how many significant figures are counted?

• 1

• 2

• 3

• 4

In the number 2076.02, how many significant figures are there?

• 7

• 6

• 5

• 4

If a number is reported as 4000.0, how many significant figures does it have?

• 1

• 2

• 6

• 5

What changes when a number is reported as 4000. instead of 4000?

• It remains the same

• It has fewer significant figures

• It has more significant figures

• It becomes an approximation