Juan added ammonium chloride to distilled water during an experiment. He noticed that the temperature of the mixture decreased. Which statement about Juan's experiment is true?

The term “iron curtain” was based on an actual iron curtain that german theaters used to separate the stage from the audience in case of a fire. who or what did the “iron curtain” of the cold war separate? democratic nations from communist nations the soviet union from its allies the united states from europe europe from asia