week 7 physio
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| what controls the rate of diffusion? | Influenced by temperature, energy input, and molecular size.
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| what is the pH of human blood? | 7
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| what is a mole? | 1 mole= 6.02 x 10 - 23 atoms (avogadro's number)
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| what is molarity? | number of moles solute per liter
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| what is a solvent? | liquid that dissolves the solvent (water)
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| what is a solute? | substance dissolved in liquid
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| what is an isotope? | contain equal number of protons, but different number of neutrons in the nuclei, and so they differ in atomic mass but not in chemical properties.
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| what is the difference between hydrophilic, hydrophobic and amphipathic molecules? how do they become this way? | -hydrophilic: Water loving
-hydrophobic: Water fearing
-amphipathic: Is both hydrophobic and hydrophilic.
whether they are polar, nonpolar, charted or uncharged.
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| what is a solution? what is the normal role of water in a solution? why is water so good at this role? | -solute + solvent = solution
dissolve the solvent.
because it is amphipathic, contains both hydrophilic and hydrophobic regions.
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| how is a polar covalent bond different from a non-polar one and what is electronegativity? | -polar covalent bonds share electrons unequally.
-non-polar covalent bonds share electrons equally, more time with one atom.
-electronegativity is atom's attraction or electrons.
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