Consider these chemical equations. n2(g) + 3h2(g) → 2nh3(g) c(s) + 2h2(g) → ch4(g) 4h2(g) + 2c(s) + n2(g) → 2hcn(g) + 3h2(g) which 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?

Why is nh3 classified as a polar molecule

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.