Fe2O3(s) + 3SO3(g) → Fe2(SO4)3 how many molecules of Fe2(SO4)3 are produced if 300 atoms of SO3 are reacted?

How many molecules of SO3 are needed to react with 200 molecules of Fe2O3 given this balanced chemical equation?
Fe2O3(s) + 3SO3(g) → Fe2(SO4)3

2. how is heavy water different from normal water

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

3) in peaches, [oh]=3.16x10-11 m a) find [h+ ] b) what is the ph? c) is the solution acidic, basic, or neutral?