ch equation(s) do you need to reverse in order to calculate the overall equation for the formation of HCN and H2 from NH3 and CH4? Check all that apply. N2(g) + 3H2(g) mr003-1.jpg 2NH3(g) C(s) + 2H2(g) mr003-2.jpg CH4(g) 4H2(g) + 2C(s) + N2(g) mr003-3.jpg 2HCN(g) + 3H2(g) What must you do before adding the equations?
