Mastering Significant Digits and Measurements in Chemistry

What is the significance of non-zero digits in a number?

• They are always significant.

• They are never significant.

• They are significant only if they are at the end.

• They are significant only if there is a decimal.

How many significant digits are in the number 42784?

• 3

• 4

• 5

• 6

In the number 120, how many digits are significant?

• 4

• 3

• 2

• 1

What makes trailing zeros significant?

• They are always significant.

• They are significant if there is a decimal.

• They are significant if they are at the beginning.

• They are significant if they are in the middle.

How many significant digits are in the number 98420.10?

• 5

• 6

• 7

• 8

Which zeros are never significant?

• Zeros between non-zero digits

• Trailing zeros with a decimal

• Leading zeros

• All zeros are significant

How many significant digits are in the number 0.819?

• 1

• 4

• 2

• 3

How many significant digits are in the number 0.2000500?

• 7

• 4

• 5

• 6

How many significant digits are in the number 4,300.0?

• 4

• 6

• 5

• 3

How many significant digits are in the number 0.553092?

• 7

• 5

• 6

• 4