In all living system we can always find basic elements carbon, oxygen, nitrogen and hydrogen, carbon is the basic building unit contained in living matter. The percentage of carbon in the mass of living matter is 19.0% oxygen and hydrogen are present in almost all organic compound which creates living organisms.

5 0

3 years ago

What is the pH of a 0.00125 M HCl solution?

timofeeve [1]

Answer:

$pH=2.9$

Explanation:

Hello,

In this case, the pH is computed by:

$pH=-log([H^+])$

Whereas the concentration of hydrogen ions equals the concentration of the acid for strong acids such as hydrochloric acid (HCl) due to its complete ionization in solution, which means that such concentration is 0.00125 M. Thus, the pH turns out:

$pH=-log(0.00125)\\\\pH=2.9$

Regards.

4 0

3 years ago

HELP ME PLEASE PLEASE PLEASE!!!!!

Elis [28]

Answer:

I think it's b but good luck and nice profile pic :D

6 0

3 years ago

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