Ionic bonds are formed between metal and nonmetal elements. potassium has only one valence electron and it is stripped away in the process of forming an ionic bond. nonmetals, such as chlorine, tend to gain valence electrons in the formation of ionic bonds. determine which element(s) are likely to have their electrons stripped away in the formation of ionic bonds. i) aluminum ii) sulfur iii) oxygen iv) silver v) neon a) ii and v b) i and iv c) i, ii, and iii d) iii, iv, and v

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.

Nonpoint source pollution is difficult to control because it

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.