Chapter 3 Chemistry Review

Scientific Notation

100

8.39 x 10^-5

0.0000839

200

(4x10⁷)(2x10^-3)

8x10⁴

300

(6.3x10^-2)/(2.1x10⁴)

1.54x10^-10

400

(7.1 x10^-2)+(5x10^-3)

7.6x10^-2

500

(4.6x10³)-(1.8x10³)

2.8x10³

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

When adding Hydrochloric Acid to Magnesium wire, the scientists noticed the test tube began to get warm. Is the Quantitative or Qualitative? 

Qualitative

300

pico

10^-12

400

Kilo

10³

500

10^-6

Micro

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