Chem Review #1

This bullseye demonstrates...

• High Accuracy & High Precision
• High Accuracy & Low Precision
• Low Accuracy & High Precision
• Low Accuracy & Low Precision

Students worked in teams to measure the length of an object. Their results are listed below. The actual length of the object was 7.0 cm. Select the best choice that represents their data in terms of accuracy and precision

GROUP RESULTS

5.00 cm

5.01 cm

5.02cm

4.99 cm

5.00 cm

4.99 cm

• both accurate and precise

• only accurate

• only precise

• not accurate and not precise

A Student determines the volume of a cube to be 4.6 cm³. What is the percent error if the the correct volume of the cube is 4.3 cm³?

• 8%

• 6%

• 7%

• 9%

What is 416,000,000 in scientific notation?

• 4.16 x 10⁸
• 4.16 x 10⁹
• 4.16 x 10^-8
• 4.16 x 10^-9

What is 2.8 x 10^-4 in standard notation?

• 28,000
• 280,000
• .00028
• .000028

Arrange the numbers from least to greatest:
216,000,000 ; 2.2 x 10³ ; 3.1 x 10⁷ ; 310,000

• 2.2 x 10³ ; 310,000; 3.1 x 10⁷ ; 216,000,000
• 310,000 ; 2.2 x 10³ ; 3.1 x 10⁷; 216,000,000
• 3.1 x 10⁷ ; 310,000; 2.2 x 10³; 216,000,000
• 2.2 x 10³ ; 3.1 x 10⁷ ; 310,000 ; 216,000,000

Multiply:
(3.4 x 10⁵)(1.2 x 10^-3)

• 4.08 x 10^-8
• 4.8 x 10²
• 4.08 x 10²
• 4.08 x 10^-15

Solve:   (9.21 x 10⁹) - (6 x 10⁹)

• 3.21 x 10¹⁸
• 1.521 x 10¹⁰
• 15.21 x 10⁹
• 3.21 x 10⁹

How many significant figures: 2016 m

• 1
• 2
• 3
• 4

How many significant figures: 0.012 km

• 1
• 2
• 3
• 4