Consider the following. 22Na → 22Ne + + + e
Calculate the energy released (in MeV) in the + decay of 22Na, the equation for which is given above. The masses of 22Na and 22Ne are 21.994434 and 21.991383 u, respectively. (Assume 1 u = 931.5 MeV/c2.)
7.72

Incorrect: Your answer is incorrect.
MeV

thermal energy is the answer

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 =