In an experiment 3.1 gram of Phosphorous reacts with 24 grams of Bromine to form Phosphorous Bromide. Calculate the empirical formulae of Phosphorous Bromide. The relative atomic mass of Phosphorous is 31 and Bromine is 80.

A2-kg bowling ball is 1 meter off the ground on a post when it falls. just before it reaches the ground,its traveling 4.4 m/s. assuming that there is no air resistant, which statement is true a. the initial potential energy is less then the final kinetic energy b. the mechanical energy is not conserved c. the mechanical energy is conserved d. the initial potential energy is greater than the final kinetic energy