May want to ask the schools you plan to apply to. Some schools frown on summer science courses.
As far as the material, you could probably do it. If you attempt to actually grasp the material, you will not have much if any of a summer.
If you are only so far as orgo, have you not taken altogether that many other science courses? The prereqs may be enough to get you in, but not having more courses under your belt will likely leave you at a distinct competitive disadvantage in comparison to students with more relative courses.