the heat of fusion of a compound is 30.0 joules per gram. what is the number of joules of heat that must be absorbed by a 15.0 geam sample to change the compound from solid to liquid at its melting point

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.

Word equation for k(s) +h2o(l) yield koh (aq) + h2

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius