2Ag2O(s)-> 4Ag(s) + O2(g) What total volume of gas forms if it is collected over

Question

2Ag2O(s)-> 4Ag(s) + O2(g) What total volume of gas forms if it is collected over water at a temperature of 25 Celscius and a total pressure of 759mmHg I need to comvert too the pressure to atm and I do but dont know how to get the right answer please help It said Not quite. Check through your calculations; you may have made a rounding error or used the wrong number of significant figures.

Explanation / Answer

Let UNITs guide you; always USE THEM in your calculation to prevent errors Firstly, the eqn: 2Ag2O (s) -> 4Ag (s) + O2 (g) moles O2 = (1 mole O2 / 4 moles Ag) * 16.1 g Ag / atwt Ag g/mole = ?? pO2 = Ptotal - pH2O at 25C = 761mm - 23.76mm H2O = ?? V of O2 = nRT/pO2 = moles O2 * R * 298K / pO2 = ?? Plug and SOLVE Basic mathematics is a prerequisite to chemistry – I just try to help you with the methodology of solving the problem.

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