Exam 1 Review

Match the following

• Heterogeneous mixture

• the composition, structure, properties, and reactions of matter

• Chemistry is the study of...

• a substance that always has the same composition and properties

• Mythology

• components are not uniform

• Chemical

• not science

SI Unit for measurement

• Meter (m)

• Kilometer (km)

• centimeter (cm)

How many significant figures are in:

4930.090

• 7

• 9

• 8

• 10

How many sig figs in:

0.000490

• 4

• 7

• 3

• 6

Metric unit for volume

• Liter (L)

• Cubic Meter (m^3)

• Gallon

• Deciliter (dL)

How many centimeters (cm) in 34.05 inches?

2.54 cm = 1 in

• 13.4 cm

• 86.49 cm

• 86.5 cm

• 13.41 cm

How many sig figs:

200,000.

• 1

• 6

• 3

• 7

How many sigfigs are in the answer of:

39.408 * 2.3 * 4.59

• 2

• 3

• 4

• 1

How many sig figs are in the answer of:

0.004 + 3.9 + 7.21

• 4

• 2

• 3

• 6

How many tablets of iron does a person need to take per day if they need 40. miligrams of iron a week? One tablet has 500. micrograms of iron.

1 mg = 1,000 mcg (micrograms)

• 114 tablets

• 11 tablets

• 11.4 tablets