In the following reaction, how many grams of ammonia (nh3) will produce
300 grams of n2?
4nh3 + 6no → 5n2 + 6h2o
the molar mass of ammonia is 17.0337 grams and that of nitrogen is 28.02 grams.

394.794 grams

227.967 grams

145.899 grams

616.865 grams

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.

Why is the bottom layer of a trophic pyrimid the

+= + + balance the equation on coefficients, ex. 1,1,1