Chemistry, 20.11.2020 01:00 cindykulei3719
Joshua observed the changes in the cake when it was baked in a oven. What best explains that he observed a chemical change?
A. He saw the rising batter from the cake in the oven.
B. He saw the cake expand outside the rim of the baking dish
C. He noticed the flour and other ingredients lose their unique properties
D. He Noticed the steam from the moisture rise in the oven
Answers: 1
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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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Joshua observed the changes in the cake when it was baked in a oven. What best explains that he obse...
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