Acompound is 57.14% c, 6.16% h, 9.52% n, and 27.18% o. calculate the empirical formula. if the molar mass is 294.30 g/mol, what is the molecular formula?

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.