2. which of the following best defines a scientific theory?
a. a well-established, highly-reliable explanation of a natural event
b. a preliminary guess or idea about an event in nature.
c. a true statement about an event in nature.
d. a well-established principle that does not include an explanation.

Rank the following four acids in order of increasing bronsted acidity : h2f+ , ch3oh, (ch3)2oh+ , ch3sh2+

How many peaks will be present in a mass spectrum for brcl?

2-bromo-2-methylbutane undergoes an e1 elimination reaction in the presence of ethanol. in the next reaction only one of the possible products is represented. although the product shown is not the major product of the reaction, notice that there is more than one way it can be produced. complete the mechanism and draw the missing substances.