Assertion: When the added electron goes to a smaller n=3 quantum level, the electron- electron repulsion is much less.

Reason: The added electron occupies a smaller region of space

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

What is the mass of 0.46 mol of mgcl2

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.