Using the balanced equation given below, calculate the number of moles of CaO required to produce 2.0 moles of Al2O3. ___ moles of CaO *your answer should be written as X. X

2AlBr3 + 3CaO —> Al2O3 + 3CaBr2

(I need this asap please!)

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.