bb
,This book is a gift that we hope would be of help to our family at STEM.
bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb
Sincerely,
STEM Freelancer’s association
bb bb
,Chapter 1: Chemical Foundations
bb bb bb
1. Which of the following is an example of a quantitative observation?
bb bb bb bb bb bb bb bb bb bb
A) The piece of metal is longer than the piece of wood.
bb bb bb bb bb bb bb bb bb bb
B) Solution 1 is much darker than solution 2. bb bb bb bb bb bb bb
C) The liquid in beaker A is blue.
bb bb bb bb bb bb
D) The temperature of the liquid is 60°C.
bb bb bb bb bb bb
E) At least two of the above (A-D) are quantitative observations.
bb bb bb bb bb bb bb bb bb
ANS: D DIF: Easy
b b REF: 1.2
KEY: Chemistry | general chemistry | general concepts | scientific
b b bb bb bb bb bb bb bb bb
methodMSC: Conceptual
bb b b b
2. A quantitative observation
bb bb
A) contains a number and a unit bb bb bb bb bb
B) does not contain a number bb bb bb bb
C) always makes a comparison bb bb bb
D) must be obtained through experimentation
bb bb bb bb
E) is none of these bb bb bb
ANS: A DIF: Easy
b b REF: 1.2
KEY: Chemistry | general chemistry | general concepts | scientific
b b bb bb bb bb bb bb bb bb
methodMSC: Conceptual
bb b b b
3. Generally, observed behavior that can be formulated into a statement,
bb bb bb bb bb bb bb bb bb
sometimesmathematical in nature, is called a(n)
bb b bb bb bb bb bb
A) observation
B) measurement
C) theory
D) natural law bb
E) experiment
ANS: D DIF: Easy
b b REF: 1.2
KEY: Chemistry | general chemistry | general concepts | scientific
b b bb bb bb bb bb bb bb bb
methodMSC: Conceptual
bb b b b
4. The statement ―The total mass of materials is not affected by a chemical change in
bb bb bb bb bb bb bb bb bb bb bb bb bb bb
thosematerials‖ is called a(n)
bb b bb bb bb
A) observation
B) measurement
C) theory
D) natural law bb
E) experiment
ANS: D DIF: Easy
b b REF: 1.2
KEY: Chemistry | general chemistry | general concepts | scientific
b b bb bb bb bb bb bb bb bb
methodMSC: Conceptual
bb b b b
5. A chemical theory that has been known for a long time becomes a law.
bb bb bb bb bb bb bb bb bb bb bb bb bb
, ANS: F DIF: Easy
b b REF: 1.2
KEY: Chemistry | general chemistry | general concepts | scientific
b b bb bb bb bb bb bb bb bb
methodMSC: Conceptual
bb b b b
6. Which of the following metric relationships is incorrect?
bb bb bb bb bb bb bb
A) 1 microliter = 10–6 liters
bb bb bb bb
B) 1 gram = 103 kilograms
bb bb bb bb
C) 103 milliliters = 1 liter bb bb bb bb
D) 1 gram = 102 centigrams
bb bb bb bb
E) 10 decimeters = 1 meter
bb bb bb bb
ANS: B DIF: Easy
b b REF: 1.3
KEY: Chemistry | general chemistry | general concepts | measurement | SI unit |
b b bb bb bb bb bb bb bb bb bb bb bb bb
prefixesMSC: Quantitative
bb b b b
7. For which pair is the SI prefix not matched correctly with its meaning?
bb bb bb bb bb bb bb bb bb bb bb bb
A)
B)
C)
D)
E)
ANS: C DIF: Easy
b b REF: 1.3
KEY: Chemistry | general chemistry | general concepts | measurement | SI unit |
b b bb bb bb bb bb bb bb bb bb bb bb bb
prefixesMSC: Conceptual
bb b b b
8. A metric unit for length is
bb bb bb bb bb
A) gram
B) milliliter
C) yard
D) kilometer
E) pound
ANS: D DIF: Easy
b b REF: 1.3
KEY: Chemistry | general chemistry | general concepts | measurement | SI unit | base
b b bb bb bb bb bb bb bb bb bb bb bb bb bb
unitMSC: Conceptual
bb b b b
9. Which of the following is not a unit in the SI system?
bb bb bb bb bb bb bb bb bb bb bb
A) ampere
B) candela
C) Kelvin
D) meter
E) calorie
ANS: E DIF: Easy
b b REF: 1.3
KEY: Chemistry | general chemistry | general concepts | measurement | SI unit | base
b b bb bb bb bb bb bb bb bb bb bb bb bb bb
unitMSC: Conceptual
bb b b b
10. Order the four metric prefixes from smallest to largest.
bb bb bb bb bb bb bb bb