Chem 280 Midterm Questions with 100% complete
Solutions Passed (GRADED A+)
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 - VERIFIED 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. - VERIFIED 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 - VERIFIED 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 - VERIFIED 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 - VERIFIED ANSWER - d. The water in the swimming
pool feels colder than it was yesterday.
What is quantification? - VERIFIED 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 - VERIFIED 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 - VERIFIED ANSWER - b. 2
A solution is an example of a (an):
a. heterogeneous mixture.
b. homogeneous mixture.
c. element.
d. pure substance.
e. compound. - VERIFIED 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 - VERIFIED ANSWER - d. hecto.
Which type of energy is associated with position?
a. electrical
Solutions Passed (GRADED A+)
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 - VERIFIED 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. - VERIFIED 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 - VERIFIED 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 - VERIFIED 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 - VERIFIED ANSWER - d. The water in the swimming
pool feels colder than it was yesterday.
What is quantification? - VERIFIED 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 - VERIFIED 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 - VERIFIED ANSWER - b. 2
A solution is an example of a (an):
a. heterogeneous mixture.
b. homogeneous mixture.
c. element.
d. pure substance.
e. compound. - VERIFIED 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 - VERIFIED ANSWER - d. hecto.
Which type of energy is associated with position?
a. electrical
