Answer:
Inter-molecular forces and molecular volumes are the chief reasons for lower measured pressure
Explanation:
The kinetic theory assumes that gas particles occupy a negligible fraction of the total volume of the gas. It also assumes that the force of attraction between gas molecules is zero.
However, during high pressure, the volume of the gas particles are not negligible compare to the total gas volume and as such the volume of a real gas under such condition is higher than the Ideal gas. Vander-waal attempted to modify the ideal gas equation by subtracting the excess volume from the ideal equation. The increased volume is the reason the measured pressure of a real gas is less than an ideal gas
On the other hand, close to condensation, the other assumption of negligible forces of attraction becomes invalid. As inter-molecular distances decrease, inter-molecular forces increase reducing the bombardment of the wall of the container due to restricted particle movement and lower measured gas pressure.
<u>Answer:</u> The equilibrium concentration of are 0.0266 M.
<u>Explanation:</u>
The chemical equation for the ionization of calcium chromate follows:
The expression for equilibrium constant is given as:
We are given:
The concentration of solid substances are taken to be 1. Thus, they do not appear in the equilibrium constant expression.
Let the equilibrium concentration for be 'x'
Putting values in above equation, we get:
Hence, the equilibrium concentration of are 0.0266 M.
Answer:
5200 ppm
Explanation:
As per the definition, parts per million of a contaminant is a measure of the amount of mass of contaminant present per million amount of the solution. It is denoted by ppm.
Given in the question,
Water = 250 ml = 250 g
Lead = 1.30 g
So,
ppm of Lead = = = 5200 ppm
So, as calculated above, there is 5200 ppm of lead present in 250 ml of water.
Answer:
i think electron cloud model