How is yalls moring goin?

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse