Explain the temperature and pressure required for manufacture of `NH_3` (ammonia)by Haber's process ?

……..is used in manufacture of ammonia by Haber's process

The catalyst used in the manufacture of NH_3 by Haber ' s process is

Explain the effect of change in pressure on speed of sound in air at constant temperature.

Calculate the constant external pressure required to compress 2 moles of an ideal gas from volume of 25 dm^3 to 13 dm^3 when the work obtained is 4862.4 J.

Complete the given chart/ table : Following table explains the conditions during evolution of a star . Compare the conditions with the temperature , pressure of the gas (P) and the gravitational force (F_G) between gas particles and complete the following table .:

At pressure P and absolute temperature T a mass M of an ideal gas fills a closed container of volume V. An additional mass 2M of the same gas is added into the container and the volume is then reduced to V/3 and the temperature to T/3 . The pressure of the gas will now be:

What is the minimum pressure required to force the blood from the heart to the top of the head (vertical distance 0.5m ) ? [density of blood is 1040 kg m^(-3). Fraction is to be neglected and g=9.8ms^(-2) ]