What two variables are held constant when testing Boyle's Law in a manometer? pressure mass of gas atmospheric pressure D volume of gas temperature

When testing Boyle's Law in a manometer, the two variables that are held constant are:<br /><br />1. Mass of gas<br />2. Temperature<br /><br />Boyle's Law states that the pressure of a given mass of gas is inversely proportional to its volume at a constant temperature. Therefore, both the mass of the gas and the temperature must remain constant during the experiment.