Chemistry, 22.01.2020 08:31 klivingston1012
What is surface tension? why do molecules at the surface of a liquid behave differently from those within the interior? answer by selecting all true statements.
- a molecule at the surface has a lower potential energy than a molecule in the bulk of the liquid.
- a molecule at the surface has higher potential energy than a molecule in the bulk of the liquid.
-surface tension is directly proportional to the energy needed to increase its surface area.
- surface tension is related to the tendency of a liquid to maximize its surface area.
- surface tension is related to the tendency of a liquid to minimize its surface area.
- surface tension is not related to the energy needed to increase its surface area.
Answers: 3
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Consider the reduction reactions and their equilibrium constants. cu+(aq)+eββ½βββcu(s)pb2+(aq)+2eββ½βββpb(s)fe3+(aq)+3eββ½βββfe(=6.2Γ108=4.0Γ10β5=9.3Γ10β3 cu + ( aq ) + e β β½ β β β cu ( s ) k =6.2Γ 10 8 pb 2 + ( aq ) +2 e β β½ β β β pb ( s ) k =4.0Γ 10 β 5 fe 3 + ( aq ) +3 e β β½ β β β fe ( s ) k =9.3Γ 10 β 3 arrange these ions from strongest to weakest oxidizing agent.
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