Properties of gases:
The gaseous state is the simplest of the three physical states and shows the greatest regularity in behaviour. The chief characteristic properties of gases are:
1. A gas neither possesses a definite volume nor a definite shape.
2. All the parts of a gas or a gaseous mixture have similar composition throughout.
3. Gases can expand indefinitely to fill up all the available space.
4. The molecules or atoms of a gas are in a state of continuous zig-zag motion in all directions.
5. Two or more gases mix swiftly and easily to give a homogeneous mixture.
6. On cooling and applying pressure gases can be liquefied.
7. The gases exert pressure on the walls of the container as a result of collisions of the particles against the walls of the container.
A manometer is connected to a gas containing bulb. The open arm reads 43.7 cm where the arm connected to the bulb reads 15.6 cm. If the barometric pressure is 743 nm mercury what is the pressure of the gas in a bar?