What are the three types of Covalent bonds? and what is the difference between them? Help!!!
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What are transitions between a liquid and gas called? identify which way they are transitioning

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?