calculate the total volume of gas at STP that is produced when 1gram of silver nitrate is heated in AgNO3=Ag+NO2+O2

Answer 1

Fist, balance the equation:
2AgNO3 → 2Ag + 2NO2 + O2
So, how many moles of AgNO3 in 1 gram?
You will get that many moles of NO2 and half that many of O2.
At STP, one mole occupies 22.4L
So now just crank it out.