It's a food web. A food web connects the foods that certain organisms can eat.
We make use of ratios to solve this question.
moles NaOH = c · V = 0.1923 mmol/mL · 26.66 mL = 5.126718 mmol
moles H2SO4 = 5.126718 mmol NaOH · 1 mmol H2SO4 / 2 mmol NaOH = 2.563359 mmol
Hence
[H2SO4]= n/V = 2.563359 mmol / 42.45 mL = 0.06039 M
The answer to this question is [H2SO4] = 0.06039 M
<h3><u>Answer;</u></h3>
-436 kJ/mol
<h3><u>Explanation;</u></h3>
- When two hydrogen atoms approach each other the potential energy of the combination becomes lower and lower until it reaches a minimum value of -436 kl/mol at a distance of 75 pm.
- A covalent bond forms when two or more valance electrons are attracted by the positively charged nuclei of two atoms and thus are shared between both atoms.
Assuming that the reaction is unimolecular on both
reactant and product sides such that:
HA + OH-
--> A- + H2O
Therefore the amount of A- left is:
mmol HA = 9.00 - 3.00 = 6.00 <span>
mmol A- = 3.00
pKa = - log Ka = 5.25
</span>
<span>Calculating for pH:
pH = 5.25 + log 3.00/6.00</span>
<span>
pH = 4.95 </span>
