Determine the total net force and the direction of movement for each situation

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)