can one gas displace another gas
The gas evolved from the reaction is collected by attaching one end of a hose to the reaction container and inserting the other up into the inverted gas collection bottle. As the gas is created, it will displace water from the bottle.The volume of gas can be determined by the amount of water that was displaced by the gas. The volume of gas collected and the gas laws can be used to calculate the number of moles of gas collected.his equation can be used to calculate the pressure of the gas collected. Once the pressure of the collected gas is known, the number of moles of gas can be calculated using the ideal gas law: PV= nRT. Where: 1  P = Pressure of the gas. 2  V = Volume of water displaced. 3  n = number of moles of gas. 4  R = the ideal gas constant.