Answer:
bacteria
Explanation:
the bacteria is what they eat and drink so they addapt to it
The value of an element that is used is the molar mass. An isotope is another form of the element. The difference is there are different number of protons in each isotope. Molar mass is a unit to measure the mass of the substance over the amount of substance in terms of moles.
Answer : The millimoles of acetate need to add to this solution will be, 18.2 mmol
Explanation :
For acetic acid, 
Moles of of acetic acid = 10 mmol
pH = 5.00
Using Henderson Hesselbach equation :
![pH=pK_a+\log \frac{[Salt]}{[Acid]}](https://tex.z-dn.net/?f=pH%3DpK_a%2B%5Clog%20%5Cfrac%7B%5BSalt%5D%7D%7B%5BAcid%5D%7D)
Now put all the given values in this expression, we get:


Thus, the millimoles of acetate need to add to this solution will be, 18.2 mmol