Asample of ch4 is confined in a water manometer. the temperature of the system is 30.0 °c and the atmospheric pressure is 98.70 kpa. what is the pressure of the methane gas, if the height of the water in the manometer is 30.0 mm higher on the confined gas side of the manometer than on the open to the atmosphere side. (density of hg is 13.534 g/ml).

Explanation:

The given data is as follows.

  = 98.70 kPa = 98700 Pa,  

      T = = (30 + 273) K = 303 K

      height (h) = 30 mm = 0.03 m (as 1 m = 100 mm)

Density = 13.534 g/mL =

                = 13534

The relation between pressure and atmospheric pressure is as follows.

             P =

Putting the given values into the above formula as follows.

            P =

               =

               = 102683.05 Pa

               = 102.68 kPa

thus, we can conclude that the pressure of the given methane gas is 102.68 kPa.

B. mole/s

Explanation:

Molar mass is defined as the mass of 1 mole of the compound. It is calculated by adding the masses of all the elements present in the compound.

A mole is defined as the amount of substance that contains Avogardro number of the substance. Avogadro's number is given by .

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles. Standard condition of temperature (STP)  is 273 K and atmospheric pressure is 1 atmosphere respectively.

Pressure of the gas is defined as the force exerted by the particles on the walls of the container. It is expressed in various terms like 'mmHg', 'atm', 'kiloPascals' etc..