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Chem 280 Midterm Exam Latest 2024 WCU@ Question and Answers
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Chem 280 Midterm Exam Latest 2024 WCU@ Questionand Answers
Which state of matter has indefinite shape and is compressible?
a. liquid
b. solid
c. gas
d. plasma
e. none of the above - ANSWER: c. gas
Which type of energy is associated with motion?
a. potential
b. chemical
c. kinetic
d. electrical
e. none of the above - ANSWER: c. kinetic energy
What type of energy is associated with the burning of gasoline?
a. kinetic
b. chemical
c. potential
d. electrical
e. none of the above - ANSWER: b. chemical
The decimal value 1 is equal to which exponential?
a. 10^3
b. 10^1
c. 10^0
d. 10^2
e. none of the above - ANSWER: c. 10^0
The base SI unit for temperature is:
a. atmospheres.
b. Celsius.
c. Kelvin.
d. Fahrenheit.
e. none of the above - ANSWER: c. Kelvin.
Which of the following is NOT an example of a physical property?
a. Solid ice can be very brittle.
,b. Liquid water can turn into steam in a heated tea kettle.
c. Water can form hydrogen and oxygen gas under electrolysis conditions.
d. Water can freeze solid at 32 degrees Fahrenheit.
e. none of the above - ANSWER: c. Water can form hydrogen and oxygen gas under
electrolysis conditions.
Which of the following is considered a hypothesis (as opposed to an observation)?
a. Spiders have eight legs.
b. Fresh lava from a volcano is hot.
c. The Washington Monument is 555 feet tall.
d. Birds can fly because they have hollow bones.
e. one of the above - ANSWER: d. Birds can fly because they have hollow bones.
The distance from New York City to Washington, DC is approximately 235 miles.
Identify the correct solution map to convert from miles to kilometers using the prefix
multipliers and the given conversion factors: 1 mile = 5280 ft; 1 ft = 12 in; 1 in = 2.54
cm. - ANSWER: Refer to photo on desktop.
The correct number of significant figures in the number 0.002320 is:
a. 7
b. 4
c. 3
d. ambiguous
e. none of the above - ANSWER: b. 4
The correct multiplier for the prefix milli is:
a) 10^ -3
b) 10^ -6
c) 10^ -9
d) 10^ -12
e) none of the above - ANSWER: a) 10^ -3
Which statement would NOT be an example of "quantification"?
a. The newest model of that car gets five more miles per gallon than last year's
model.
b. The average high temperature this July was two degrees higher than last year's
average high temperature.
c. The price of milk went up ten cents per gallon.
d. The water in the swimming pool feels colder than it was yesterday.
e. none of the above - ANSWER: d. The water in the swimming pool feels colder than
it was yesterday.
, What is quantification? - ANSWER: the determination of the absolute or relative
abundance (often expressed as a concentration) of one, several or all particular
substance(s) present in a sample.
How many significant figures should be reported in the answer to the following
calculation?(4.00) ×× (11.1) =
a. 0
b. 2
c. 1
d. 3
e. none of the above - ANSWER: d. 3
How many significant figures should be reported in the answer to the following
calculation?
((37.57)(13.332)) divided by (6.0)
a. 3
b. 2
c. 1
e. 4 - ANSWER: b. 2
A solution is an example of a (an):
a. heterogeneous mixture.
b. homogeneous mixture.
c. element.
d. pure substance.
e. compound. - ANSWER: b. homogeneous mixture.
The correct prefix for the multiplier 100 is:
a. nano.
b. mega.
c. centi.
d. hecto.
e. none of the above - ANSWER: d. hecto.
Which type of energy is associated with position?
a. electrical
b. kinetic
c. chemical
d. potential
e. none of the above - ANSWER: d. potential
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