How many atoms of magnesium nitride (Mg3N2 ) (molar mass: 96.93 g/mol) is needed to react with an excess amount of potassium oxide to produce 11.6 liters of magnesium oxide (MgO) (molar mass: 40.30 g/mol)?

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