Solve following questions and show all the steps.

1. calculate the ph of a 2.0x10-4 m solution of aniline hydrochoride, c6h5nh3cl.

2. for a solution of 50 mm sodium chloride and 100 mm magnesium acetate, determine the ionic strength and the average activity coefficient for the na+/cl- ions.

3. calculate the mean ionic activity coefficient of a solution that is 10 mm ca(no3)2 (aq) at 298k.

the plateau is likely to turn into a desert do to corrosion.

there are no components of a physical goal mentioned on the list of choices that you've provided.

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 =