In the following reaction, 81.2 mL of O 2(g) is collected over water at 23.0°C and a barometric pressure of 751 mm Hg. What must have been the mass in grams of Ag2O(s) decomposed? (The vapor pressure of water at 23.0°C is 21.1 mm Hg).
2 Ag2O(s) → 4 Ag(s) + O2(g)
a) no given answer is close
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