Final Exam Prep

Sig Figs

100

How many sig figs are in 0.000125 m?

3

200

How many sig figs are in 3.5070 x 10⁴ m?

5

300

How many sig figs are in 1120600 kg?

5

400

How many sig figs are in 8901 mm?

4

500

How many sig figs are in 1.32500 x 10⁵ m?

6

Rounding

100

Round 10,789 to 2 sig figs  

11,000

200

Round 0.000046012 to 4 sig figs 

0.00004601

300

Round 2.697 to 3 sig figs 

2.70

400

3500 to 1 sig fig

4000

500

1.289 x 10³ to 2 sig figs

1.3 x 10³

Dimensional Analysis

100

Convert 4598mg to kg

0.004598kg or 4.598 x 10^-3kg

200

Convert 3845kg to lb

8477lb

300

Convert 32mg/mL to kg/dL

0.0032kg/dL or 3.2 x 10-3kg/dL

400

Acetone has a density of 0.7857g/cm3. What is the volume in mL of 7.22g of acetone?

9.19mL

500

Antifreeze has a density of 1.11g/cm3. What is the mass in grams of 387 mL of antifreeze?

4.30 x 10²g

Addition/Subtraction

100

43.78 + 2.351

46.13

200

35.81 - 4.762

31.05

300

0.08251 - 0.0067

0.0758

400

15.976 + 2.33 + 4.87

23.18

500

21.8 + 14.391 - 5.67

30.5

Multiplication/Division

100

13.891 x 2.147

29.82

200

8.97 ÷ 3.21

28.8

300

0.00740 x 46.0218

0.341

400

936.0 ÷ 4.28 ÷ 1.9

120

500

6.301 x 76 x 0.008

4