Heat is the transfer of what energy?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride