classs 6 girls and boys come in zoom it is science class come fast with your name classs is stated come fast I am waiting

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

The excretory system,need answers for all: )

Which of the following describes a situation where competition between producers exists