Which of the following is the balanced chemical equation that represents the chemical reaction of hydrogen and oxygen to produce water

Why are the trends and exceptions to the trends in ionization energy observed?

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

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)