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(Chem-1010) Introductory to Chemistry. Final Exam.(already passed).
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(Chem-1010) Introductory to Chemistry. Final Exam.(already passed).
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(Chem-1010) Introductory toChemistry. "Final
Exam."(already passed)
MODULE 1--3
Which of the following DOES NOT describe the scientific process?
A. The scientific process is most often used to help answer moral and
ethical questions.
B. In order to consider experimental results valid, experiments must be
replicable.
C. Science is the process of gathering knowledge about the natural world.
D. There are many different ways to investigate a scientific question.
E. Scientific research usually leads to the development of new questions.
F. More than one of the above statements DOES NOT describe the
scientific process.
A
After testing and refining many ideas, scientists often develop a
comprehensive model that explains why things behave as they do. This
type of model is best referred to as a(n):
A. scientific theory
B. scientific law
C. scientific hypothesis
D. scientific postulate
A
A scientist may propose a testable statement or explanation for a
phenomenon based on limited evidence, but which can serve as the
starting point for further investigation. This explanation is best referred
to as a(n):
A. scientific theory
B. scientific law
C. scientific hypothesis
D. scientific postulate
C
,Why is reproducibility such a vital component of science?
A. Reproducibility allows a scientist a second chance to show that their
initial findings were correct.
B. Reproducibility is a vital component of science because it provides
repeat funding.
C. An experiment can only be considered valid if other scientists can
reproduce the results.
D. Modern scientific procedures provide built-in assurances so that
reproducibility is no longer considered to be a vital component of science.
C
You suspect that if you change the oil in your car, that the gas mileage of
the car will increase. You take the car to a mechanic and get the oil
changed. This action on your part is an example of a(n):
A. scientific theory
B. scientific experiment
C. scientific hypothesis
D. scientific law
B
Which of the following is the most correct statement regarding the
relationship of science and technology?
A. Technology and science are basically the same thing.
B. The primary goal of science is the development of new technology.
C. New technologies tend to arise from scientific discoveries.
D. The ultimate goal of technology is the development of new science.
C
Which of the following would NOT be described correctly as matter?
A. sand
B. clouds
C. water
D. heat
E. All of the above would be correctly described as matter.
D
Which of the following would NOT be described as applied research?
A. The development of more efficient batteries.
B. The design of a more effective blood pressure medication.
C. The classification of organisms living near deep sea vents.
,D. The development of more affordable solar panels.
E. All of the above would be described as applied research.
C
Which of the following are appropriate units for a measure of
volume? Select all that apply, this is a multiple response question.
A. liters
B. grams
C. kilometers
D. cubic centimeters (cm3)
E. milligrams
A and D
A sample of metal has a mass of 0.0793 grams. What is this mass in
milligrams?
A. 7.93 x 10-6 mg
B. 793 mg
C. 79.3 mg
D. 7.93 x 1012 mg
C
How many microseconds (μs) are in 125 nanoseconds?
A. 0.125 μs
B. 1.25 x 105 μs
C. 1.25 x 1017 μs
D. 1.25 x 10-13 μs
A
Which of the following statement(s) were NOT part of Dalton's atomic
theory?
A. (a) Every element is composed of extremely small particles called
atoms.
B. (b) In a normal chemical reaction, atoms are neither created nor
destroyed.
C. (c) The fundamental structure of atoms can be changed during a normal
chemical reaction.
D. Neither (b) nor (c) were part of Dalton's atomic theory.
E. Neither (a), (b) nor (c) were part of Dalton's atomic theory.
C
, Who was the first person to propose the idea of the atom?
A. Democritus
B. Aristotle
C. Lavosier
D. Mendeleev
A
The mass and weight of an object are measured both on Earth and on the
planet Mars. Complete the statements below.
The mass of the object on Earth and on Mars
?
The weight of the object on Earth and on Mars
?
would be the same, would be different
If you had 50.0 grams of water (density = 1.00 g/mL) and 50.0 grams of
glycerin (density = 1.26 g/mL), which sample would occupy the greater
volume and why?
A. Water would occupy the greater volume because it is more dense.
B. Water would occupy the greater volume because it is less dense.
C. Glycerin would occupy the greater volume because it is more dense.
D. Glycerin would occupy the greater volume because it is less dense.
B
What is the volume of a sample that has a mass of 18.5 grams and a
density of 0.784 grams/mL?
A. 23.6 mL
B. 14.5 mL
C. 0.0424 mL
D. 18.5 mL
A
An insect is flying at 30 mph. The energy of motion that is related to the
mass of the insect and also its velocity would be an example of what type
of energy?
A. kinetic energy
B. gravitational potential energy
C. elastic potential energy
D. chemical potential energy
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