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CHEM 1360: FINAL
After nitrogen and oxygen, the next most abundant gas in dry air is:
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argon |
Acid rain is defined as precipitation with pH:
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below 5.6
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The pollutant that is harmful at Earth's surface, yet protects life when in the stratosphere is:
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ozone |
Rain water is naturally acidic due to dissolved:
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carbon dioxide
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Hard water may be characterized by the presence of all of the following ion except:
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Na+
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In the process represented by the equation, H2O(g)->H2O(I), the entropy:
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decreases
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The principal constituent in natural gas is
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CH4
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On what physical property is the separation of petroleum fractions base?
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boiling point
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About what percentage of the electricity produced in the US comes from coal burning?
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50%
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Nuclear power plants produce about what percent of electricity in the US?
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20%
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What is the shape of a water molecule?
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Bent |
Bent |
Linear
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The correct name of NH4HCO3:
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Ammonium Hydrogen carbonate
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The mass of 4.75 moles of H2SO4 is:
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466g
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How many moles of CO2 are there in 453.6g of CO2?
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10.3 mol
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A solution contains 15.0g of sucrose and 60.0 of water. What is the percent by mass of the sucrose?
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20.0%
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A gas occupies 4.00 L at 2.00 atm pressure. At what pressure would the volume be 6.00 L?
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1.33 atm
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When the temperature is changed, the volume is halved. How is the new temperature related?
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The Kelvin temperature is halved
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What percentage of background radiation comes from natural sources:
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82%
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The largest artificial source of background radiation is from:
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medical x-rays
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medical x-rays
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radon
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What is the mass and charge of gamma radiation?
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0,0
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A patient is given a 48mg dose of technetium-99m (half-life 6.0 h). How much remains after 36h?
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0.75 mg
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How old is a piece of wood. C-14, t1/2=5730y, The activity is 3.9 counts/min. Assume the activity of carbon-14 was 15.6 counts per min per gram at the time of burial:
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11,460 y
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11,460 y
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gamma |
Which subatomic particle are responsible for carrying on the chain reaction of fission?
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neutrons
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The isotope used in uranium fission reactions is:
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Uranium 235
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What fraction of natural uranium is the fissile isotope?
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<1%
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The process represented by the equation 21H+21H->42He+energy
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fusion
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Hydrogen-2 and hydrogen-3 fuse to form helium-4. The other product is a(n)
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neutron
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The three major types of foods are:
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carbohydrates, fats, and proteins
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When most monosaccharides dissolve in water, they form:
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ring structures
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The iodine number of a fat or oil is a measure of
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degree of unsaturation
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In shape, trans fatty acids resemble:
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saturated fatty acids
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Kilo-calories in 1g each of carbohydrates, fat, and proteins are:
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4,9,4
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Strict vegetarian diets are often deficient in:
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vitamin B-12 and iron
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People with high blood pressure are usually told to restrict intake of:
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Na+
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The fat soluble vitamins are:
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A,D,E,K
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The monomer units of starch and cellulose are:
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Alpha-glucose and Beta-Glucose
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Small quantities of carbohydrates can be stored in liver and muscles as:
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glycogen
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Digestion of sucrose produces:
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glucose and fructose
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Lipids are classified based on:
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solubility in non-polar solvents
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Fats are:
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esters of glycerol and fatty acids
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The general formula R-O-R' is:
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ether |
R-CO-R' is an:
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ketone
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The general formula for an ester is:
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RCOOR'
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The name for CH3CH2CH2CH2NH2:
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butylamine
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The name for CH3CONH2 is:
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acetamide
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In a condensation polymerization, the two products are a polymer and (usually):
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water |
Which class of organic compounds serve as the stating materials for many polymers?
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Alkenes |
When an alcohol reacts with a carboxylic acid the product is a:
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ester |
Which of the following is the formula for butanoic acid?
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CH3CH2CH2COOH
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The main theme of Rachel Carson's Silent Spring was the life would be destroyed by:
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Pesticides |
The prefix that means 10-3 is:
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Milli-
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One quart is slightly less than one:
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Liter |
if the volume of a rock is 8.0 cm3 and its mass is 16.0g, its density is:
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2.0 g/cm3
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A beta particle is a(n):
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electron
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The mass of a gamma ray is:
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0
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The main shell electron configuration of Silicon(Si) is:
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2,8,4
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The main shell electron configuration of Silicon(Si) is:
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Cl and Br
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The alkaline earth metals are found in group:
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2 |
The alkaline earth metals are found in group:
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yogurt
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Lemons taste sour due to
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Citric acid
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What amount in moles of hydrochloric acid is needed to neutralize 2.4 mol of calcium hydroxide?
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4.8 mol
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The hydrogen ion concentration, [H+], of a 0.0010 M HNO3 solution is:
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1.0x10-3 M
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Which of the following is a precursor to acid rain?
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sulfur dioxide
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Which substance is the oxidizing agent?
Cu(s)+2Ag+(aq) = Cu2+(aq)+2Ag(s)
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Ag+
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The leading chemical product of U.S. is
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sulfuric acid
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Which of the following is a common antacid?
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CaCo3
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Which of the following is not an example of how we view oxidation?
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electrons gained
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