4 HgS + 4 CaO -> 4 Hg + 3CaS + CaSO4 You began this reaction with 21.4 grams of calcium oxide. If you actually produced 9.35 grams of calcium sulfate, what was your percent yield, rounded to 3 sig-figs.
Use the following molar masses for your calculations:
Hg= 200.59 g/mol
S= 32.066 g/mol
Ca= 40.078 g/mol
O= 16 g/mol

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.