Question

SO2 AT STP CONTAINED IN A FLASK WAS REPLACED BY O2 UNDER IDENTICAL CONDITION OF PRESSURE TEMPRATURE AND VOLUME.THEN THE WEIGHT OF WILL BE _____________ OF SO2

Answer 1

The weight of O2 will be half than that of SO2.. Because, under the same pressure,volume and temperature,number of moles of gas in container remains same.(PV=nRT).since molecular weight of O2 is half than that of SO2, the weight(=moles*molecular weight) of O2 will be half than that of SO2