While driving your rental car on your vacation in Europe, you find that you are getting 12.6 km/L of gasoline. What does this value correspond to in miles per gallon?

One does not belong why? ice, gold ,wood ,diamond and table salt

When a septic tank backs up a goes in to clean it out

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)