CHEM 62547 | Course Paper

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Superglue is made from this monomer, cyanoacrylate.

Which is a representation of the head-to-tail to head-to-tail arrangement of the

polymer?

Which compound has a correct formula?

A. CaSO3

B. Ca2SO4

C. Mg(CO3)2

D. Na2PO4

Use this table to answer the questions.

Comparing peanut oil and chicken fat, what do you observe?

A. Peanut oil has more saturated fat than chicken fat.

B. Chicken fat has more linoleic acid than peanut oil.

C. Peanut oil has more monounsaturated fatty acids.

D. Chicken fat has more total unsaturated fatty acids.

Which fact is not important when drawing conclusions from C-14 dating?

4-25-2013

A. Living organisms exchange carbon with the atmosphere.

B. C-14 has a half-life of 5,715 years.

C. Dead organisms do not exchange carbon with the atmosphere.

D. C-14 emits beta particles.

The general formula for coal is C135H96NOS, the molecular formula for methane is

CH4 and the molecular formula for dodecane is C12H26. Which will the heat of

combustion of polyethylene be more similar to?

A. coal

B. methane

C. dodecane

D. hydrogen gas

The level of protein structure directly determined by the sequence of nucleotides on

DNA is

A. primary

B. secondary

C. tertiary

D. double helix

Fission is the process of creating energy by

A. combining small nuclei to form a larger, more stable nucleus.

B. combining small nuclei to form a larger, less stable nucleus.

C. splitting large nuclei to form smaller, more stable nuclei.

D. splitting large nuclei to form smaller, less stable nuclei.

Methane is approximately 23 times more powerful than carbon dioxide as a greenhouse

gas. Which are significant sources of methane emissions?

I. The digestive systems of ruminants (cows, sheep, etc.)

II. Automobile exhaust

III. Rice cultivation

IV. Decaying wetland vegetation

A. I only

B. I and II only

C. II only

D. I, III, and IV only

DNA, the genetic material of living organisms, is damaged by light in the

A. visible region of the spectrum.

B. ultraviolet region, especially below a wavelength of 320 nm.

C. ultraviolet region, especially above a wavelength of 340 nm.

D. infrared region of the spectrum.

Which of these represents a portion of a polyester molecule?

The line-angle drawings of two fatty acids are shown. Which structural feature do they

have in common?

A. carboncarbon double bonds

B. carboxylic acid group (COOH)

C. polyunsaturation

D. They have no features in common.

The correct name for CuO is

A. copper oxide.

B. monocopper oxide.

C. copper(I) oxide.

D. copper(II) oxide.

A NiCd battery uses nickel and cadmium to produce a potential difference. Using these

equations, answer the following questions.

I. 2NiO(OH) (s) + 2H2O (l) + 2 e– → 2Ni(OH)2(s) + 2 OH (aq)

II. Cd (s) + 2OH (aq) → Cd(OH)2 (s) + 2e

III. Cd (s) + 2NiO(OH) (s) + 2 H2O (l) → 2 Ni(OH)2(s) + Cd(OH)2(s)

Which equation represents the whole chemical reaction within the galvanic cell?

A. I

B. II

C. III

D. I and II

Which is not a component of a fuel cell?

A. a timer

B. an anode

C. a cathode

D. an electrolyte

Which of the following is a pure substance?

A. Lemonade

B. Concrete

C. Gasoline

D. Silver wire

Which pollutant is present in air as particulate matter?

A. soot

B. ozone

C. sulfur dioxide

D. carbon monoxide

The lowest (or closest to the ground) layer of our atmosphere is the

A. troposphere.

B. ozone layer.

C. stratosphere.

D. mesosphere.

Plasmids are

A. linear pieces of DNA.

B. linear pieces of RNA.

C. circular pieces of DNA.

D. circular pieces of RNA.

Which is true about radioactivity? Radioactivity

A. is used to treat certain cancers.

B. damages white blood cells.

C. damages DNA.

D. All of these choices are true.

Which diagram(s) best represent(s) only individual atoms?

A. I only

B. II only

C. III only

D. IV only

E. II and III only

Which diagram(s) best represent(s) only molecules?

A. I only

B. II only

C. III only

D. I and II only

E. IV only

Potable water is water that

A. contains residual chlorine.

B. is safe to drink and to cook with.

C. is contaminated with lead.

D. contains too much residual ozone to be drinkable.

Rank the forms of nuclear radiation from highest to lowestmass.

A. gamma, alpha, beta

B. beta, gamma, alpha

C. alpha, gamma, beta

D. alpha, beta, gamma

What is the coefficient for oxygen in the balanced chemical equation for the

combustion of heptane (C7H16)? Unbalanced equation: C7H16 + O2 → CO2 + H2O

A. 11

B. 8

C. 7

D. 1

Calculate the mass of 2.50 x 104 molecules of nitrogen gas.

A. 5.81 x 1019 g

B. 1.16 x 1018 g

C. 7.00 x 105 g

D. 5.38 x 1026 g

For good health, which daily intake of minerals is best?

A. 1 g Na+ and a trace amount of Se

B. 10 g Na+ and a trace amount of Se

C. 1 g of Na+ and 1 g of Se

D. 10 g of Na+ and 1 g of Se

For linear n-hexane, C6H14, which molecular representation is correct?

A fuel cell does not “run down” like a standard battery because

A. the reactants in a battery must be stored inside the battery, whereas the reactants for

a fuel cell flow in as needed.

B. a fuel cell continually recycles the same electrons, whereas a battery must

continually generate new ones.

C. a battery is completely dependent upon oxidation-reduction reactions, whereas a fuel

cell depends on acid-base reactions.

D. a battery has many moving parts, whereas a fuel cell has none.

Which diagram(s) best represent(s) only diatomic molecules?

A. I only

B. II only

C. I and II only

D. II and IV only

WUKF FM transmits at 93.5 MHz. What is the wavelength of the electromagnetic

radiation that carries the station’s signal?

A. 6.42 x 109 m

B. 3.21 m

C. 3.21 x 106 m

D. 3.12 x 1015 m

Stratospheric ozone is destroyed and formed at the same rate

A. above the equator.

B. above the Antarctic in its early spring.

C. above the Antarctic in its early fall.

D. above the equator and above the Antarctic in its early fall.