• 10 mL graduated cylinder (ML stands for milliliter) •gram scale
•water
• 6 metal paper clips of the same size and material

Part A
Use the gram scale to measure the mass of the empty graduated cylinder, and record the value.

Please help!!

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 =