# Problem: 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 b) 1.49 c) 0.744 d) 2.98 e) 2.07

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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

b) 1.49

c) 0.744

d) 2.98

e) 2.07

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Collecting Gas Over Water concept. If you need more Collecting Gas Over Water practice, you can also practice Collecting Gas Over Water practice problems.

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Based on our data, we think this problem is relevant for Professor Gupta's class at UML.