1. Which represents an estimated measurement? A) The U.S. national debt is 6 tri

Question

1. Which represents an estimated measurement?

A) The U.S. national debt is 6 trillion dollars.

B) My bank account contains 19 dollars and 26 cents.

C) A calendar week has 7 days.

D) There are 50 states in the United States of America.

2. Chemical energy can be transformed into __________.

A) heat energy
B) light energy
C) all of these answers
D) electrical energy

3. Which is an incorrect conversion factor?

A) 1m/10^-2cm

B) 1km/10^3m

C) 10^-3m/1mm

D)10^-3km/1m

4. Which of the following contains the largest number of atoms?

A) 1.0 mole C6H14
B) 3.0 moles water
C) 12.0 moles silver
D) 3.0 moles N2O5

5. Alkenes have the general molecular formula CnH2n. Thus, when n = 2, the alkene is C2H4. If an alkene has a molecular mass between 65 and 75, this alkene is __________.

A) C5H10
B) C6H3
C) C5H12
D) C6H12

Explanation / Answer

1) A

2) C

3) A

4) D

5) A

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