Answer:
<h2>0.05 moles</h2>Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
<h3>0.05 moles</h3>Hope this helps you
Answer:
(A) 0.129 M
(B) 0.237 M
Explanation:
(A) The reaction between potassium hydrogen phthalate and barium hydroxide is:
Where A⁻ is the respective anion of the monoprotic acid (KC₈H₄O₄⁻).
We <u>convert mass of phthalate to moles</u>, using its molar mass:
Now we <u>convert mmol of HA to mmol of Ba(OH)₂</u>:
Finally we calculate the molarity of the Ba(OH)₂ solution:
(B) The reaction between Ba(OH)₂ and HCl is:
So<u> the moles of HCl that reacted </u>are:
And the <u>molarity of the HCl solution is</u>: