Chem 1010 - General Chemistry 1 » Fall 2021 » CH1 The Nature of Chemistry
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Question #1
Your chemistry grade often has a significant impact on your ability to pursue certain careers. Choose the statement that best summarizes why this might be true.
A.
Chemistry, because it focuses on matter, is the foundation of all areas of science. High performance in chemistry classes is a strong indicator of potential success in fields such as medicine. Training in chemistry sharpens one's ability to think quantitatively, abstractly, and nanoscopically.
B.
Training in chemistry sharpens one's ability to think quantitatively, abstractly, and nanoscopically.
C.
Chemistry, because it focuses on matter, is the foundation of all areas of science
D.
High performance in chemistry classes is a strong indicator of potential success in fields such as medicine.
Question #2
Choose the step in water purification that is intended to form a colloidal gel trapping fine particles in water prepared for drinking.
A.
Ozonation or chlorination
B.
Coarse screening
C.
Aeration
D.
Treatment with slaked lime and alum
Question #3
Which of these statements is characteristic of a law?
A.
It has not been contradicted by experiments, it predicts unknown results and it summarizes a wide range of experimental results.
B.
It predicts unknown results and it summarizes a wide range of experimental results.
C.
It has not been contradicted by experiments.
D.
It summarizes a wide range of experimental results.
Question #4
Choose the statement that is quantitative.
A.
A chemical compound containing lead and sulfur forms shiny, plate-like, yellow crystals.
B.
Aluminum metal is a conductor of electricity.
C.
A chemical compound containing cobalt and chlorine is blue.
D.
The element chlorine boils at -34.6 °C
Question #5
Which pair of properties do all solids have?
A.
Conducts electricity well; compressible
B.
Has definite shape and volume; not compressible
C.
Compressible; brittle
D.
Good conductor of heat; takes shape of container
Question #6
Choose the statement which is true about physical properties.
A.
One important physical property is whether a substance is degraded by exposure to oxygen.
B.
The measurement of physical properties always involves a phase change.
C.
The measurement of physical properties does not break any bonds.
D.
Physical properties depend on the mass of the material being considered.
Question #7
To determine the density of a liquid, the volume of a 21.2 g sample of the liquid was measured to be 24.60 mL at 22.5°C. Calculate the density of the liquid at this temperature to the proper number of significant figures.
A.
0.862 g/mL
B.
1.16 g/mL
C.
2.32 g/mL
D.
0.942 g/mL
Question #8
If 5.00 g Ta (density = 16.65 g/mL) is placed in a graduated cylinder partially filled with water, how many milliliters of water will be displaced?
A.
3.330 mL
B.
83.3 mL
C.
83.25 mL
D.
0.300 mL
Question #9
Choose the chemical property.
A.
The compound C2H6O has a density of 0.789 g/mL at 20°C.
B.
Dry Ice sublimes (changes directly from a solid to a gas) at -78°C.
C.
Acetylene, C2H2, burns in air to form carbon dioxide, CO2, and water, H2O.
D.
Cellulose is not soluble in water.
Question #10
Which of these is a chemical property?
A.
flammability
B.
atomic mass
C.
melting point
D.
color
E.
density
Question #11
Which of the following is a heterogeneous mixture?
A.
Rubbing alcohol
B.
An asphalt (blacktop) road
C.
Clean air
D.
Sugar water
Question #12
Which species below is a chemical compound?
A.
H2
B.
HF
C.
F2
D.
S8
Question #13
Which of the following is not a nanoscale object?
A.
A sugar molecule
B.
A xenon atom
C.
A muscle cell
D.
A protein
Question #14
Which of these statements is a nanoscale interpretation of temperature?
A.
Heat flows from a body of higher temperature to one of lower temperature.
B.
Temperature is a measure of how vigorously the particles in the sample are rotating, vibrating, or moving about.
C.
Temperature can be measured in Kelvin, centigrade, or Fahrenheit degrees with equal precision.
D.
Temperature indicates the amount of heat present in the sample whose temperature was measured.
Question #15
In the early 1800's, the atomic theory of matter was proposed by:
A.
Demokritos
B.
Dalton
C.
Bohr
D.
Heisenberg
E.
Einstein
Question #16
What is the symbol for mercury ?
A.
Mg
B.
Rg
C.
Hg
D.
Cm
Question #17
A.
Has low density
B.
Forms alloys
C.
Conducts heat
D.
Is malleable
Question #18
Choose the set of elements that all exist as diatomic molecules.
A.
Sc, Y, La
B.
B, S, P
C.
Cl, N, O
D.
Ni, Ag, Au
Question #19
Which of these alkaline earths is in the sixth period of the periodic table?
A.
Ba
B.
Ca
C.
Sr
D.
Cs
Question #20
A.
76 g
B.
0.16 g
C.
0.76 g
D.
1.6 × 10–4 g
E.
16 g
Question #21
Choose the mechanism by which paclitaxel inhibits cancer cell replication.
A.
It suppresses the activity of telomerase.
B.
It cross-links DNA at critical locations to prevent transcription.
C.
It prevents the collapse of microtubules.
D.
It intercalates between base pairs to stiffen the DNA strand.
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