The numbers used in the mole ratio come most directly from? select one
1. the balanced equation
2. molar masses
3. the number of particles
4. the number '1'

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.