Chemistry
Significant Figures Problem Set

Chem B11

Name_____________________________________

Lab Period_________________________________

1. How many significant figures are in the following numbers?

6.06 g

1000 cars

85%

1.06 qt/L

25.0 mL

1.05 x 105 m

25 tablets

45 miles/hr

0.000059 m

1001 in

10250. mcg

24 hrs/day

105100 lb

30.8 mg

5.6 x 10-7 g

1000 m/km

2. Scientific Notation. Keep the same number of significant figures.

2.74×10-4

4.06×104

100010000

5.01×106

3.2×10-2

0.000700

1.1×10-3

6×10-6

50.0

3. Calculations: do the following math problems giving the answer with the right number of significant figures. Round your answers in the right way according to sig fig rules.

a. 11.1 + 12.06 + 10 =

g. 25.0 x 10.00 =

b. 12500 + 2330 – 1000 + 10.6 =

h. 66/100.9 =

c. 0.0045 + 0.04602 – 0.0000020 =

i. (15.2 x 23)/26.34 =

d. 4 x 10-3 x 3 x 10-2 x 2 x 10-4 =

j. 6.21 x 1040/(4.678 x 10-50)

e. 8 x 102/(2 x 10-7) = k.

f. 9 x 10-4 x 3 x 107/(1.2 x 106) =

4. What do you see? Read the following measurements with the right number of significant figures. (the scale is in mL)

Image result for graduated cylinder meniscus

Reading:_________________

Image result for ruler measurements cm significant figures

Reading:__________________

Image result for milligram scale weighing picture

Reading:____________________

2

Bakersfield College Wade Ellis