How many grams of aluminum are needed to produce 6.3 Liters of hydrogen gas at STP? 2 Al + 6 HNO3 à 2 Al(NO3)3 + 3 H2

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

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