Question 2 of 20 : Select the best answer for the question, 2. The combustion of fuel oil to heat a home is an example of a/an A. substitution reaction, B. exothermic reaction, C. metathesis reaction. D. endothermic reaction

c. 75.7

i think that is the right

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.

a is the correct answer