f 400cm of Q was collected at and 1.20 x 105 Nm2, calculate the volume it would occupy at s.t.p and the number of molecules of Q present. standard pressure = 1.0 x 10³ Nm ² Avogadro constant = 6.02 x 10", 1 mole gas occupies 22.4 dm³' at s.t.p) WASSCE). given mass of oxygen is 0.15dm³