The new volume is 38 ml.
Explanation:
At NTP,
P1 = 760 mm,
P2 = 800 mm,
V1 = 40 ml
Boyle's law states that when a gas is held at a constant temperature and mass in a closed container, the volume and pressure vary inversely.
By applying Boyle's law,
P1 V
1 = P2 V2
where P1, P2 represents the pressure of a gas,
V1, V2 represents the volume of a gas.
P1 V
1 = P2 V2
760×40 = 800×V 2
V 2 = (760×40) / 800
V2 = 38 mL.
