Which chemical equation follows the law of conservation of mass? A. LiOH + H2CO3 → Li2CO3 + 2H20
B. 2LIOH + H2CO3 → Li2CO3 + 2H20
C. 2LIOH + H2CO3 → LICO3 + 2H20
D. 2LIOH + H2CO3
Li2CO3 + H20

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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 =

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