Answer:
[H⁺] = 1.58x10⁻⁶M; [OH⁻] = 6.31x10⁻⁹M.
pH = 8.23; pOH = 5.77
Explanation:
pH is defined as <em>-log [H⁺]</em> and also you have <em>14 = pH + pOH </em>
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Thus, for a solution of pH = 5.80.
5.80 = -log [H⁺] → [H⁺] = 10^-(5.80) = 1.58x10⁻⁶M
pOH = 14-5.80 = 8.20 → [OH⁻] = 10^-(8.20) = 6.31x10⁻⁹M
Thus, for a solution of [H⁺] = 5.90x10⁻⁹M and pH = -log 5.90x10⁻⁹M = 8.23
And pOH = 14-8.23 = 5.77
Stoichiometry comes down to the mole ratios, as given by the balanced chemical equation. Your balanced equation says that 1 mole of sugar will react with 12 moles of oxygen to make 12 moles of CO2 and 11 moles of water. If 12 moles of oxygen reacts with 1 mole sugar, then how many moles of oxygen will react with 2 moles of sugar? Despite the fact that sugar can be used for model rocket fuel, this ain't rocket science.
As for the other two, you still have to work with the mole ratios as given by the balanced equation. But you have to covert the mass of NH3 to moles first, then figure out the moles of ammonium chloride and then convert it back to grams. This is best done with a couple of conversion factors.
Answer:
A decrease in entropy is balanced by a large increase in the entropy of the surrounding water molecules.
Explanation:
Water's ability to dissolve a wide variety of molecules is important, but more important is the hydrophobic effect, which drives the aggregation of hydrophobic molecules and plays a role in the folding of proteins and formation of lipid-bilayers.
Entropy is a measure of disorder of a system. Forcing water to be ordered decreases entropy, a very unfavorable situation. Water has the ability to force hydrophobic molecules away causing their aggregation. Water gains entropy when the fatty acids (hydrophobic) are forced into the lipid-bilayer. Thus, a decrease in entropy is balanced by a large increase in the entropy of the surrounding water molecules.
B is the answer I
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A Ana
Answer:
im pretty sure its a push or pull thing
Explanation:
Tensional stress is the stress that tends to pull something apart. It is the stress component perpendicular to a given surface, such as a fault plane, that results from forces applied perpendicular to the surface or from remote forces transmitted through the surrounding rock.
