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How you can quickly calculate the mean of the following test scores without adding the numbers. 76,73,78,75? How much energy (in J) is contained in 1 mole of photons with a wavelength of 44 cm? pleaseeeee give the answer in two sig figs , urgent? How many isomers are possible for [Zn(gly)2] (tetrahedral)? - express as an integer.? What would u consider me as in lools? What is the worlds highest recorded temperature?