This document provides an exercise on significant figures with 6 questions. It asks the learner to 1) identify the number of significant figures in given numbers, 2) round numbers to three significant figures, and 3) report numbers to the correct number of significant figures based on their associated uncertainty. This covers key concepts in significant figures including determining the number of significant figures, rounding, and expressing numbers according to their precision based on uncertainty.

1. YB
Spring 2009
EXERCISE
SIGNIFICANT FIGURES
1. How many significant figures are there in the following numbers?
a. 1.9030
b. 0.03910
c. 1.40 x 104
2. Round each number to three significant figures:
a. 0.21674
b. 0.2165
c. 0.2165003
3. Report the following numbers to the correct number of significant figures:
a. 163 ± 11 mg/L
b. 163 ±1.23 mg/L
c. 1570 ± 21 mg/kg
d. 1570 ± 108 mg/kg
e. 0.214 ± 0.003% w/v
f. 0.214 ± 0.03% w/v