Free fall: A ball is projected upward at time t = 0.0 s, fro…

Free fall: A ball is projected upward at time t = 0.0 s, from a point on a roof 90 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is if air resistance is negligible. The time when the ball strikes the ground is closest to

Lithium and nitrogen react in a combination reaction to prod…

Lithium and nitrogen react in a combination reaction to produce lithium nitride:                        6Li(s) + (g) → N(s)In a particular experiment,  1.00-g samples of each reagent are reacted. The theoretical yield of lithium nitride is ________ g.