Ap Chemistry Worksheet - Dr. Kathleen Gorski, Wilbraham And Monson Acaddemy
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24SUMMER WORK
AP Chemistry
Summer 2014
Dr. Kathleen Gorski, Chair, Science Department
kgorski@wma.us
1.1 Which of the following figures represents (a) a pure element, (b) a mixture of two elements,
(c) a pure compound, (d) a mixture of an element and a compound? (More than one picture
might fit each description.) [Section 1.2]
1.2 Does the following diagram represent a chemical or physical change? How do you know?
[Section 1.3]
1.5 (a) Three spheres of equal size are composed of aluminum, silver, and nickel . List the spheres
from lightest to heaviest. (b) Three cubes of equal mass are composed of gold, platinum, and
lead. List the cubes from smallest to largest. [Section 1.4]
1.6 The following dartboards illustrate the types of errors often seen when one measurement is
repeated several times. The bull’s-eye represents the “true value,” and the darts represent
the experimental measurements. Which board best represents each of the following
scenarios: (a) measurements both accurate and precise, (b) measurements precise but
inaccurate, (c) measurements imprecise but yielding an accurate average? [Section 1.5]
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