Chemistry Unit 1 Assessment

Express the following in scientific notation:

.000457

• 457 x 10⁶

• 457 x 10^-6

• 4.57 x10⁴

• 4.57 x 10^-4

Convert to scientific notation:

520,000,000

• 52 x 10⁷

• 5.2 x 10^-7

• 5.2 x 10⁸

• 0.52 x 10⁹

State the number of significant figures in the following measurement: 153.0 mL

• 1

• 2

• 3

• 4

State the number of significant figures in the following measurement: 1530 mL

• 1

• 2

• 3

• 4

How many significant figures does the following number have: 0.00204

• 6
• 4
• 3
• 2

3 km = ___________ mm

• 30

• 300

• 3,000

• 3,000,000

7,000 g = ____ kg

• 70

• 700

• 7

• 0.07

What is this?

• hot plate

• thermometer

• bunsen burner

• beaker

a narrow-necked glass container, typically conical or spherical, used in a laboratory to hold reagents or samples

• Beaker

• graduated cylinder

• Erlenmeyer Flask

a form of protective eyewear that usually enclose or protect the area surrounding the eye

• funnel

• lab glasses

• contact lenses