You have been given the task of designing a heat pack to relieve soreness in muscles by combining oxygen and iron. The more oxygen that is added to iron, the more it will heat up. Which of the following temperature changes would you be looking for?
A. There will not be a reaction
B. An increase in temperature, showing an endothermic reaction
C. You should not expect a temperature change because this is a physical reaction
D. An increase in temperature, showing an exothermic reaction
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The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion
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When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh β
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The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.
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