A law stating that the volumes of gases undergoing a reaction at constant pressure and temperature are in a simple ratio to each other and to that of the product.
Gay-Lussac's law, known as the law of combining volumes, states that: The ratio between the combining volumes of gases and the product, if gaseous, can be expressed in small whole numbers
p1.V1 = p2.V2 (Boile-GayLussac's gas law) 755(torr)*1105(mL) = p2(torr)*1.00(mL) The pressure is 755*1105= 8.34*105 torr = 1098 atm. (which looks rather high to me for practical purposes, and maybe oxygen / nitrogen become fluidised; moreover is your cylinder designed for pressure over -safety!- 3000 atm??)
To get the volume you must know the formula : D = M (D x V ) 1 V ( V x 1) M = DV (cancel D in numerator and D in denominator ) D D therefore , the formula is "V = M" D