Some amount of potassium dichromate K2CrO7 that is , 2.335 g is dissolved in enough H2O to prepare a solution of 500. determine the moloar concentraitions Cr2O7^2 and of K+ ?
A substance that is 22.9% Nitrogen by mass and 1 molecule contains six nitrogen atoms then What is the molar mass of this substance, express your answer in g/mol?