An solution containing an unknown quantity of iron(II) being titrated according to the following reaction:
If 39 mL of the unknown iron(II) solution requires 24 mL of 0.24M solution of Potassium
permanganate to observe a persistent pink color (the end point), What is the concentration of
iron (11)?

5Fe2+ (aq) + Mn0, (aq) + 8H* (aq) — 5Fe3+ (aq)) + Mn2+ (aq) + 4H20

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.