Buffer is formed from weak acid and its salt with strong base (its conjugate base)
So the only one correct answer is :
0.2 M H₃PO₄ and 0.2 M NaH₂PO₄
While all other choices are incorrect
The given question is incomplete as it lacks the appropriate options, however, the options related to this question is as follows:
a)Test a composite material in the lab to see how it can be improved.
b)Look into trends of various diseases and their effects on society.
c)Research available drugs for treating illnesses such as cancer and heart disease, as well as the side effects of these drugs.
d)Make a plan for how to conquer a disease with drugs.
Answer:
The correct answer is - b)Look into trends of various diseases and their effects on society.
Explanation:
The young scientist who wants to focus on creating drugs to treat disease must think and look for the diseases that are needed to be treated at the moment or affecting the population most and how it affects the society and then plan how to do it.
So, the scientist needs to check the trends of various disease and their effect on society for developing understanding which disease needs to be cure first and how it affects.
Thus, the most appropriate answer is - option B.
Answer:
The number of valence electrons determines an element's reactivity, or how likely the element is to react with other elements.
Explanation:
Answer:
It is nucleus.
Explanation:
As you see in pic in center you see protons and neutrons. And electrons are surrounding them.
The mass of proton and neutron us close together but electron has the less mass.
The pancreas, it produces a juice that contains several enzymes that breaks down nutrients.
