In the following chemical reaction, how many moles of h2 are needed to completely react with 2 moles of n2?

n2 + 3 h2 2 nh3

When the volume and number of particles of a gas are constant which of the following is also constant

Identify the electromagnets with poles that are reversed from the electromagnet shown above

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)