The measured mass of a sample of iron was 1.88 g.Which digit in the measurement has the least certainty?
A)the first digit,1
B)the middle digit,8
C)the last digit,8
D)They are all certain digits.

Question

Quizplus · Accepted Answer

The last digit, 8, has the least certainty as it is in the place of the least significance and could have been rounded up or down during the measurement. The other digits are more significant and hence more certain.

The Measured Mass of a Sample of Iron Was 1