At constant pressure, which of these systems do work on the surroundings? check all that apply.

a(s) + 2b(g) = c(g)
a(s) + b(s) = c(g)
a(g) + b(g) = c(g)
a(g) + b(g) = 3c(g)

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

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99

Which item is most likely part of the safety contract