Chem
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| Lewis structure of carbon tetrachloride | :cl::
:::cl--c--cl::::
:cl::
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| Lewis structure of hydrogen peroxide | .. ..
H-O-O-H
.. ..
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| Lewis structure of HYDROGEN SULFIDE H2S | ..
H-S-H
..
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| Lewis structure of N2 nitrogen | :N = N:
-
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| Lewis structure of hydrogen cyanide | H-C=N:
-
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| E=m(c)2 why is E very large, M is small amount thats lost | E is large because c is very large and m is a small amount lost
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| 2 gases believed to have a greenhouse effect | water vapor and carbon dioxide
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| [-CH2-CH2]-n what does n represent? | a. the number of repeating units
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| [-CH2-CH2]-n what does the formula in the braket represent? | b.the repeating unit
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| which polymer is often used in textiles. | b and c (polyethylene and polyester)
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| -C-O- ll name the function group? O | b.ester
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| Ethylene glycol, HOCH2CH2OH is used in | d. anti0freeze and polyester fiber
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| steroid nucleus | Oo
OO
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| an isotope of uraium 92 U 238 | B. 92 U 235
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| Unsaturated triglycerides contains (x) double bonds and polyunsaturated triglycerides (y) double bonds | d. (x )is one and (y) is two or three.
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| saturated triglycerides have the physical form (x) and are found principally in (y) | a.(x) solid and (y) is meat
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| triglycerides are esters formed from longchain acids and the compound | b.glycerin
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| subgroups classified as carbohydrates include the following | c. starch, sugar and cellulose
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| which of the following may be metabolized for quick energy | a.sugar
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| which of the following provide the highest energy per unit of weight | c. fats and oils
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| in the metabolism of sugar by human beings, energy is released along with the byproduct | a.carbon dioxide
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| what is the value of n for a polymer having a molecular weight of 28,000 | d.1000
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| in the polyester used extensively in textiles bottles and film which of the following is the acid used as a starting material | a. terephtalic acid
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| in the polyester used extensively in textiles bottles and film which alcohol is used as a starting material | c.ethylene glycol
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| a major advantage of fuel cell baseed oxygen and hydrogen over a lead acid battery is that a fuel cell | a.will not run down like a battery as long as hydrogen and oxygen are supplied
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| in the neutralization of acid with base, the reaction products are | a. salt plus water
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| in the neutralization reaction in which HCL is reacted with calcium hydroxide | d. the formula for calcium chloride is CaCl2
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| in petroleum refining, large molecules are first reduced size and then sperated by the stes of | D. c(craking) followed by b (distilation).
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| two important green house gases are | carbon dioxide and water vapor
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| plant metabolism usualy requires a combination of | b.carbon dioxide, chlorophyl and sunlight
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| a sample of gasoline containing a 92% octane has an octance rating | a. 92
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| acids are characterized by which ion water | a.H+ or H3O+
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| water is a poor solvent for hydrocarbons b.c | c.both A and B.
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| hydrocarbons which contain the same number of carbon atoms and the same number of hydrogen atoms are called | b.isomers
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| a reaction which required the input of energy in order to take place is considered | a. endothermic reaction
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| when HCL is neutralized with an equimolar amount of aqueous sodium hydroxide, the resulting pH should be about | a.7
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| prior to the burning of fossil fuel, acid rain contained the acid | c.carbonic acid
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| in the burning of coal containing significant amounts of sulfur which gas may be found in the atmosphere | a.SO2
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| a covalent single bond between carbon and hydrogen is compromised of | d. electron from carbon and one electron from hydrogen
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| he main problem with using coal to generate electricity | a. coal contain impurities
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| the acid in the stomach, HCL, may safely be neutralized with | a.calcium carbonate
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| the polyamide functional group contains the elements | d. C,H,N and O
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| outer electrons are exchanged in nuclear reaction, but not chemical reactions | false
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| chemists can change identify of an element in nuclear reaction but can not in chemical reactions | true
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| the energy changes associated with nuclear reaction are typical much smaller than energy changes in chemical reactions | flase
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| both nuclear and fossil fuel power plants have in common the use of steam to drive a turbine | true
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| one reason for the U.S. to increase its reliance on nuclear power is the need to reduce reliance on fossil fuels | true
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| proteins are polyamides | true
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| satruated fats contain cis and trans isomers | false
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| prior to the burning of fossil fuels, acid rain probably contained sulfuric acid | flase
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| the air we breathe contains approximately 20% oxygen and appoximately 80% nitgrogen | true
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| sugars are metabolized quickly and are therefore a source of quick energy | true
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| which subgroup of carbohydrate are disgested by cows , nit by humans beings? | cellulose
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| identify a contribution of lisa meitner | nuclear fission
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| what was fleming's discovery? | penicilan
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| how many amino acids are "essential" i.e. our bodies can;t synthesize them? | 9
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| in a battery, chemical energy is converters into electrical energy by the flow of ___from one cell to the other | electrons
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| polystryne polymer having the formula below has a molecular weight of 104,000. what is the value of n. | 1000
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