Obtain expressions for the isothermal compressibility k =(-1/v)(dv/dp)t for: (a) an ideal gas, and (b) for a van der waals gas, (c) show that in the limit v goes to (infinity) the isothermal compressibility of the van der waals gas is the same as that of an ideal gas.

number of electrons for neutral cl

b. a lightning bug, plug of grass, and a worm

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =