Which of the following statements is not correct?

a. covalent compounds are held together by much stronger interparticle forces than are ionic compounds.
b. ionic bonds and covalent bonds are the result of atoms trying to achieve full outermost energy levels.
c. more than two electrons can be transferred in ionic bonds or shared in covalent bonds.
d. covalent compounds result from sharing of electrons, and ionic compounds result from the electron transfer from one atom to another.

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.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

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