Practice Exam

Question 1

A plastic that is composed of a saturated hydrocarbon would have molecules that are most like those in which material?

Revolt · Accepted Answer

gasoline; asphalt

Question 2

If a compound has a molar mass of 180 g over mol and its empirical formula is cap c cap h sub 2 cap o , what is its molecular formula?

Revolt · Accepted Answer

cap c sub 6 cap h sub 12 cap o sub 6; cap c sub 2 cap h sub 4 cap o sub 2

Question 3

Which of these observations would indicate that a material is a pure substance?

Revolt · Accepted Answer

It changes color after heating.; It cannot be physically broken down into different types of atoms.

Question 4

Which term best describes liquid behavior under pressure?

Revolt · Accepted Answer

compressed; incompressible

Question 5

What are some applications of the field of spectroscopy? Choose five correct answers.

Revolt · Accepted Answer

for determining the distance and velocity of galaxies; for identifying elements in a sample; for use in medical imaging devices; for determining types of chemical bonds; for producing neon lights

Question 6

In a chemical equation, which symbol should be used to indicate that a substance is in solution?

Revolt · Accepted Answer

aq

Question 7

What name should be used for the ionic compound KOH ?

Revolt · Accepted Answer

potassium hydroxide; potassium oxide

Question 8

Which reason best explains why metals are malleable?

Revolt · Accepted Answer

because they have rigid bonds; because they have delocalized electrons

Practice Exam Answers

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