Unit 2 Test Prep CCR Chemistry

How many sig figs in the number 90.080?

• 1

• 2

• 3

• 4

• 5

The distance to the moon is 239,000 miles. Put that number in proper scientific notation.

• 2.39E3

• 2.39E-3

• 2.39E5

• 2.39E-5

Complete the calculation and select the answer with the appropriate number of sig figs:

2.00 x 3.0E4 =

• 6E4

• 6.0E4

• 6.00E4

• 60,000

Complete the calculation and select the answer with the appropriate number of sig figs:

65.17 - 31.9 =

• 33

• 33.27

• 33.3

• 33.2

How many sig figs in the number 0.000370

• 2

• 3

• 5

• 6

Convert 35 km to meters

• 0.035 m

• 0.35 m

• 350 m

• 3500 m

• 35000 m

Complete the calculation and select the answer with the right sig figs:

3.88E-6 / 2.2E4 =

• 1.76E-2

• 1.76E10

• 1.8E-10

• 1.7E2

You calculate your answer and get 0.3955 km. Round that answer to 3 sig figs.

• 0.400

• 0.39

• 0.396

• 0.395

You calculate an answer and get 817.65. Round that answer to 3 sig figs.

• 817

• 817.6

• 817.650

• 818

• 818.0

A Nascar record set in 1987 was 212.8 miles per hour. Determine that speed in km/min.

• 5.720 km/min

• 5720 km/min

• 20590 km/min

• 2.199 km/min