Silver tarnishes in the presence of hydrogen sulfide and oxygen according to the below reaction.
How many liters of O2 at 100.˚C and 115 kPa would be needed to react with 10.00 grams of silver?
4Ag + 2H2S + O2 —> 2Ag2S + 2H2O
By ideal gas equation -
PV = NRT.......1)
P =115 KPa = 115000 KPa
T=100 =373.15 k
R = 8.314 m
m = given mass M= Molar mass
N 0.093 moles
now putting all these value in equation ....1) we get-