Chem. Chapter 3

Measuring/Units

100

This is the standard unit for distance. 

What is a meter?

200

Write a derived unit on your board. 

g/mL, m/s, miles/hr, etc. 

300

If you have a graduated cylinder that measures to the tenths (.1), you can estimate this place. 

What is the hundredths place? (.01)

400

This many centimeters are in a meter. 

What is 100?

500

This many meters are in a kilometer. 

What is 1000?

Sci. Notation

100

Put in standard form. 3.86 x 10³

3860

200

Put in standard form. 1.8 x 10^-4

.00018

300

Put in scientific notation. 345000

3.45 x 10⁵

400

Put in scientific notation. -1.75 x 10^-2

-.0175

500

Put in scientific notation. 50001

5.0001 x 10⁴

SigFig Rounding

100

3001 has this many sigfigs. 

What is 4?

200

.00120 has this many sigfigs. 

What is 3?

300

Round 20168 to 4 sigfigs. 

20170

400

Round 1892 to 2 sigfigs. 

1900

500

Round .0011345 to 3 sigfigs. 

.00113

SigFig Calculations

100

35.6 + 56.27

91.9

200

158.08 g – 36.48 g

121.60 g

(must include unit)

300

(140.007)(4.4)    

620

400

(1.30)x(0.0769)

.0100

500

24.04 g ÷ 3.00 mL

8.01 g/mL

(must include units)

Density

100

This is the density formula. 

What is D=m/v

200

This is the standard unit for density. 

g/mL

(or g/cm³)

300

True/False. If you cut an object in half, you change its density. 

False. Density is intensive property. 

400

m=25 g, v=13 mL, D=? 

1.9 g/mL

(must include units)

500

D=12.5 g/mL, m=6 g, v=?

.48mL

(must include units)