Consider the following reaction at 298 K. C(graphite)+2H2(g)⟶CH4(g)
Δ∘=−74.6 kJ

Calculate the following quantities. Refer to the standard entropy values as needed.
Δsys= ?
Δsurr= ?
Δuniv= ?

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

Why is carbon ideal for making different compounds?

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)