22. How many grams of solid magnesium chloride, MgCl2, are needed to make 250 ml

Question

22. How many grams of solid magnesium chloride, MgCl2, are needed to make 250 ml of 0.50 M solution? d. 9.5 g a. 4.8 g 12 g b. 125 g c. 48 g 23. A covalent bond results when a pair of atoms. a. electrons are shared between atom. b. electrons are transferred from one atom to another quantum number. c. atoms have outer electrons with the same principal d. atoms pool their electrons to form a "sea" of electrons. e. an atom has 8 valence electrons nitrate and dissolved sodium sulfate results in formatio

Explanation / Answer

22.   Molarity = (w/mwt)*(1000/v in ml)

     0.5 = (w/95.211)*(1000/250)

w = 11.9 grams

answer: e

23. a ( covalent bond is formed by equal sharing of bond pair by bonded atoms)

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