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38 Cards in this Set
- Front
- Back
the most important factor in the evolution of life on earth is |
water |
|
a hydrogen bond is best defined as |
a relatively strong elctrostatic bond between hydrogen and oxygen or nitrogen |
|
which of the following compounds is capable of bonding with like molecuels |
both c and d |
|
which of the following is not a type of van der waals force |
chemical bond |
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which of the following is not an example of noncovalent interactions between molecules |
chemical bonds |
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which of the following factors is responsible for the fact that water is a liquid at room temperature |
hydrogen bonds |
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which of the following properties of water promotes the relatively constant climate of earth |
high- heath of fusion, high heat of vaporization, high heat capacity |
|
which of the following compounds is amphipathic |
ch3ch2ch2ch2ch2cooh |
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which of the following statements is true of weak acids dissolve in water |
they are partially ionized in water |
|
what is the pH of a solution where the concentration of hydrogen ions is 2x10^-5 |
4.7 |
|
which of the following would not form a suitable buffer |
hydrochloric acid/ chloride |
|
buffering capacity is directly proportional to which of the following factors |
concentraction of both components of the buffer |
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the most important buffer in blood is |
carbonate/bicarbonate buffer |
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when an individual breathes very rapidly, large amounts of carbon dioxide are exhaled. what effect does this have on blood pH |
alkalosis
|
|
salt bridges in proteins are an example of |
ionic interactions |
|
which of the following molecules will have a dipole moment |
CHCl3 |
|
which of the following molecules would form a micelle |
ch3(ch2)10COO- Na+ |
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which of the following molecules are weak acids |
HCO3 |
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which of the following ions would have the largest hydration sphere |
Li+ |
|
Hydration is best defined as |
Noncovalent interactions between water and a solute |
|
the noncovalent interactions between an amide and an alcohol would be which of the following |
hydrogen bonding |
|
crenation would result when cells are placed in a ____ solution |
hypertonic |
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which of the following is not a important noncovalent interaction of living organisms |
Carbon hydrogen bonds |
|
which of the following molecules would have unusually high heat capacities |
ammonia and methyl alcohol |
|
the hybridization of a water molecule is |
SP3 |
|
the strongest type of non covalent force is |
hydrogen bonds |
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which of the following ions would have the strongest tendency to form an ion pair with carboxylate groups the surface of a protein |
potassium |
|
which of the following species would for a buffer with HPO4^-2 |
H2PO4^-1 |
|
water can form how many hydrogen bonds |
four |
|
which of the following solutions will be isotonic with 3m sucrose |
1 mole sodium sulfate |
|
which of the following is hydrophobic |
hexane |
|
in biological systems buffers usually contain an excess of ____ |
weak base |
|
the tendency of nonpolar molecules aggregate in water medium called |
hydrophobic effect |
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the high heat of fusion of water is due to its |
hydrogen bonding |
|
which of the following species can form a buffer system |
acetic acid/sodium acetate |
|
which of the following are unsusual properties of water that suit it to be the matrix of life |
solvent characteristics |
|
what percent of the world water is drinkable |
3% |
|
the immediate effect of deforestation is |
erosion |