You are asked to calculate the concentration of a nacl (in water) solution in several ways and are given the following information: 20 g nacl, 250 ml solution, 250 g h2o, molecular weight of nacl = 58.44 g/mole. students must show all work for parts a and b.
(b) calculate the mass/mass percent concentration (4 points).
(c) calculate the molarity of the solution (6 points). (points : 10)

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.