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?

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.