A group of students collected 500 empty aluminum cans to take to the recycling center.  If 21 cans make 1.0 pound of aluminum, how many liters of  aluminum (D=2.70 g/cm3)  are obtained from the cans?

An aqueous solution of potassium hydroxide is standardized by titration with a 0.194 m solution of hydrobromic acid. if 25.2 ml of base are required to neutralize 24.2 ml of the acid, what is the molarity of the potassium hydroxide solution? m potassium hydroxide

List four observations that indicate that a chemical reaction may be taking place

What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j