Two solutions were titrated, 18.5 ml of 2.0 M HCl and 21.2 ml of NaOH solution. What was the molarity of NaOH ?

What is the mass of 8 moles of sodium atoms

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.