Select all that apply:
when the products of a reaction are hotter than the reactants: the reaction is exothermic. the reaction is endothermic. the reactants lost internal energy. the change in enthalpy is positive.

Anurse practitioner prepares an injection of promethazine, an antihistamine used to treat allergic rhinitis. if the stock bottle is labeled 25 mg/ml and the order is a dose of 11.0 mg , how many milliliters will the nurse draw up in the syringe?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

What will most likely happen when two bromine atoms bond together?