Ch4(g)+2o2(g)⇄co2(g)+2h2o(g) δh°rxn=−803kj/molrxn δs°rxn=−5j/(molrxn⋅k) the chemical equation above represents the exothermic reaction of ch4(g) with o2(g). which of the following best to explain why the reaction is thermodynamically favored (δg< 0) at 2000k and 1atm?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Displacement is the slope of a velocity vs. time graph a. true b. false