Choose the best description of what's wrong with the following electron configuration for an electrically-neutral atom of sulfur (s) (atomic number = 16): 1s1 2s2 2p5 3s2 3p6

a) the total number of electrons in the configuration does not equal 16, the atomic number of sulfur.
b) there are low energy orbitals which have not been filled to hold the maximum number of electrons.
c) the configuration is incorrect for neither of these reasons.
d) the configuration is incorrect for both reasons.

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.

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what

Which of the following describes a situation where competition between producers exists