The mineral crocidolite has the formula Na2Fe5(Si4O11)2(OH)2. How many of the iron ions per formula unit are in the 2 oxidation state and how many are in the 3 oxidation state

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

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

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added