SI Ch.1 and 2

Scientific Notation

100

What is 3,900 in scientific notation.  Use correct sig-figs.

3.9 x 10³

200

Convert 9.4 x 10^-3 from scientific notation.  Use correct sig-figs.

0.0094

300

What is 61,490,000 in scientific notation.  Use correct sig-figs.

6.149 x 10⁷

400

Convert 5.8 x 10⁶ from scientific notation.  Use correct sig-figs.

5,800,000

500

What is 0.000054 in scientific notation.  Use correct sig-figs.

5.4 x 10^-5

Sig-Figs

100

8.20 + 2 =

10

200

7.6 x 21.9 = 

170

300

1002 / (433.2 + 306) =

1.36

400

(334.54 + 198) / 84 = 

6.3

500

(22.57 + 13.889 + 6.003) x (50.20 - 24.92 - 13.667) =

493.1

Algebra

100

1 - 3x = 3x + 1

0

200

What is 70. F° in C°?

    21 C°

300

What is 244 C° in F°?

471 F°

400

Solve for x and y. 

2x + 3y = 16

5x - 4y = -6

y = 4

x = 2

500

Solve for x and y.  

x + 3y = 6

2x + 8y = -12

y = -12

x = 42

Conversions

100

Convert 0.75 L into mL.

750 mL

200

Which is greater: 45 kg or 4500 g?

45 kg

300

Convert 280 cm into km.

2.8 x 10^-3

400

Convert 115 km/h to m/s.

31.9 m/s

500

Convert 2.3 miles to cm. 

1 mile = 5280 ft

1 in = 2.54 cm

370,000 cm

Density

100

A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g.  What is its density?

2.7 g/mol

200

What is the mass of ethyl alcohol that exactly fills a 200.0 mL container?  The density of ethyl alcohol is 0.789 g/mL.

157.8 g

300

If the density of propanol is 0.828 g/mL and a sample has a mass of 14.5 g what is the volume?

17.5 mL

400

Nitrogen gas has a density of 1.25 g/L, and at normal pressure and temperature, one mole takes up 22.4 L. Calculate the moles in 860. g of nitrogen gas.

30.7 mol nitrogen gas

500

Oxygen gas has a density of 6.50 g/L, and at normal pressure and temperature, one mole takes up 22.4 L. Calculate the mass of 4.35 moles in oxygen gas.

633 g O2