Chapter 3 Chemistry Review

Scientific Notation

100

8.39 x 10^-5

0.0000839

200

4.24x10⁷

42,400,000

300

0.000000000154

1.54x10^-10

400

.076

7.6x10^-2

500

2,800,000

2.8x10⁶

Sig Fig

100

1000

1

200

1000.0

5

300

9079300

5

400

0.000780

3

500

0.00001

1

Sig Fig Math

100

12.52+349.0+8.24

369.8

200

74.626-28.34

46.29

300

7.55x0.34

2.6

400

0.365/0.0200

18.3

500

8.20 x 3.626 +35.1

64.8

Knowledge Gems

100

Michelle measured the length of an object 3 times. She measured 3.6 cm, 3.2 cm and 3.3 cm. Accurate, precise or both?

precise

200

10^-6

Micro

300

pico

10^-12

400

Kilo

10³

500

List 4 significant figure rules

All non-zero numbers are significant

all interior zeros are significant

all trailing zeros before a decimal are significant

all trailing zeros after a decimal are significant

all trailing zeros without a decimal are not significant

all leading zeros are not significant

Density

100

m=3.1g

v=0.35 mL

D=?

D=8.9 g/mL

200

M= 306.0g

V= 22.5 mL 

13.6 g/mL

300

D=0.789 g/mL

V= 200.0 mL

M=?

M= 158g

400

D= 10.5 g/mL

M= 2500g

V=?

240 mL

500

D=0.8765 g/mL

V= 250 mL

220 g

Unit Conversion

100

Convert 55mm to m

*Remember sig figs and units*

.055 m

200

Convert 158g to kg

*Remember sig figs and units*

.158kg

300

Convert 22.40 km to in

*Remember sig figs and units*

* Daily Double *

1,078,738 in -----=> 1,079,000 in

400

A circle has an area of 38540cm³. What is the area in m²?

*Remember sig figs and units*

^{* Daily Double*}

3.854m²

500

One lap of a track is 255m. To run 12.0km, how many laps should you run?

*Remember sig figs and units*

* Daily Double*

47.1 laps