An adult weighing 140 lb. is prescribed Tylenol (acetaminophen) at 0.016 g per kg of body weight. Calculate the number of moles of Tylenol that were prescribed.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j