Which answer below correctly identifies the type of change and the explanation for the change in calcium
carbonate?
A. physical change because even though a state change was observed the calcium carbonate
retained its original properties
B. physical change because even though a particle size change was observed, the calcium carbonate
retained its original properties and was not transformed into a new substance
C. chemical change because a state change was observed, which indicated that the calcium
carbonate was transformed into a different substance
D. chemical change because a particle size change was observed, which indicated that the calcium
carbonate was transformed into a different substance
Answers: 1
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Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.
Answers: 3
Which answer below correctly identifies the type of change and the explanation for the change in cal...
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