With these 3 you so much! they are about physical science and balanced reactions, again!

Adian for one of the answers i think its 2Cr + 3Cl2 --> 2CrCl3  correct me if im wrong. None of these were on my quiz so im going to try to figure out the other two

answer: i don't know the answer good luck

explanation:

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 =