7. The number of atoms of oxygen in 3.7 moles of Al2(SO4)3 is: Anyone know how to get the answer? Thanks.

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

Ineed ! i have no clue how to do this problem.