PLS HELP ASAP this student's experiment had an additional variable that made the conclusion unreliable. What was the additional variable, and how did it affect the experiment? Hint there are 16 tablespoons in a cup, so one tablespoon is 6.25 percent of one cup

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.

c. 4.54 x 10–12 j happens to be correct