The following reaction forms 159 g of Ags 2Ag2Os4AgsO2g What

The following reaction forms 15.9 g of Ag(s):             2Ag2O(s)4Ag(s)+O2(g)
What total volume of gas forms if it is collected over water at a temperature of 25 C and a total pressure of 742 mmHg ?

Solution

Solution- 25 degreeC =23.8 mmHg

Pressure of O2= 742-23.8= 718.2 mmHg

=718.2/760

=0.945 atm

Moles of Ag= 15.9/107.87=0.147 mol

Moles of O2=1/4(0.147)= 0.03675 mol

Volume of O2= 0.03675*0.08206*298.15/0.945

=0.95 L