A flexible container at an initial volume of 7.14 L contains 2.51 mol of gas. More gas is then added to the container until it reaches a final volume of 16.5 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.

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.