Element Z has three isotopes: 116Z, 120Z and 127Z. If the atomic mass of Element Z is 125.98, which of the isotopes is the most abundant (has the highest percentage) in nature?

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 volume would 2.25 moles of ne has occupy at stp?

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.