6. 498.82 mg comverted to kg​

0.00649882 kg

498.82 mg=0.00049882 kg

Explanation:

To get this answer, you must multiply the quantity of mg. by 0.000001, which is also 0.001².

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 =