2Fe2O3=4FeO+O2 1) Is this reaction endothermic or exothermic?
2) Suppose 34.8g of Fe2O3 react. Will any heat be released or absorbed?
3) How much heat will be released or absorbed? ​

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