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

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°