Chapter 3 Review

Scientific Notation

100

Convert 30,100 to scientific notation

3.01 x 10⁴

200

Convert 9.32 x 10^-5  to standard notation

0.0000932

300

Convert 0.00787 to scientific notation

7.87 x 10^-3

400

Convert 4.80 x 10⁶ to standard notation

4,800,000

500

Convert 89 to scientific notation

8.9 x 10¹

Sig Figs

100

600,000

1 sig fig

200

200.

3 sig figs

300

0.000056809800

8 sig figs

400

30.00

4 sig figs

500

30 students 

unlimited

Math time!

100

Accounting for sig figs: 

0.167 cm + 1.2 cm = 

1.4 cm

200

500.00  x 16.3 = 

8150

300

Convert 25 degrees celsius to Kelvin

298 K 

273 + 25= 298 K

400

If an object has a density of 20 g/mL and a mass of 400 g, what is the volume?

20 cm³

500

Accounting for sig figs: 

(3.01 X 10²¹) / (2.8 x 10¹⁵)

1.1 x 10⁶

only 2 sig figs possible so must round up to 1.1

Density

100

What is the formula and typical SI units for density?

mass/volume = density 

units: g/cm³ or g/mL

200

Define weight

Weight is the pull of gravity on a given mass

300

Why does ice float in water?

The ice is less dense than the water -- less mass per unit of volume

400

Define specific gravity and give the formula?

specific gravity = material density/ water density 

comparison of a substance's density to water (or another reference) density 

500

How is the density of something impacted by temperature?

Volume increases, mass stays the same--- so density DECREASES!

except water

SI Units

100

What two things does every number need to tell us?

Units and sig figs!

200

What is the SI unit for mass?

kg

300

What is the SI unit for temperature?

Kelvin (K)

400

How many millimeters are in one meter?

1000 mm = 1 m

500

How many picograms are in 1 gram?

10^-12 picograms = 1 gram