CHM 105/Graber
Spring 2016
Homework Chapter 1 and (3 partial)
Lecture:
Mon/Wed
Name (print) : _____________
Tue/Thur
(circle one)
Textbook homework problems are located in the exercises at the end of the chapters. The additional
homework problems are listed below. The answers for the textbook homework are posted on the
web site. The answers to the additional problems will be posted after the due date; after these
answers are posted (usually right after class) you can not receive credit for these questions. Answer
the extra questions on this sheet (write on the back and attach more paper if necessary). Staple
the additional questions and the textbook homework together before submitting the homework for
grading. Remember the 1/3 and 2/3 set-up for text homework problems.
Textbook Homework:
(3 points)
Chapter 1 Textbook Homework problems: 2, 5, 6, 10, 11, 14, 16, 18
Chapter 3 Textbook Homework problems (partial): 2, 3, 5, 8, 10, 12, 15, 32, 34, 36, 40, 42, 44, 48,
113, 114, 116
Additional Problems: (3 pts)
1.
Are these physical or chemical changes?
a) cutting diamond
b) baking peanut butter cookies
c) evaporating gasoline
d) browning sugar
2.
a)
b)
c)
What elements are represented by the following chemical formulas (or element
symbol)?
Which of the following are homoatomic and which are heteroatomic?
Which are elements and which are compounds?
i) Si
iii) FePO4
v) Zn
3.
ii) K
iv) Sn(OH)2
a) Give an example of a heterogeneous mixture that has homoatomic components.
b)
List the 2 types of pure substances and give an example of each.
4.
Explain the difference between a hypothesis and a theory.
5.
Give the name and symbol of your favorite element and explain why it’s your favorite element.
6.
Define matter and explain how it relates to chemistry.