Calculate the delta s rxn at 25 degrees celsius for the reaction 2nh3(g)-> > n2h4(g) + h2(g). do you know where i can find these values of the s for these compounds?

In order to find your answer you need to be measuring entropy, so you will be using the following formula:
delta S= S of (N2H4) + S of ( H2) - [2( S of NH3)]
Hope this is very useful for you

That result from subduction of oceanic plates beneath lighter continental plates. most of the earth's volcanoes are located around the pacific ring of fire because that the location of most of the earth's subduction zones.

Because a model would make the investigation easier to understand