Answer:
246.67 min
Explanation:
Half life is the time at which the concentration of the reactant reduced to half.
Half life expression for first order kinetic is:
Where, k is rate constant
So,
Given that;- k =
(Values corrected from source)
Thus,

<u>246.67 min is the half-life of the reaction.</u>
Answer:
pH = 10.113
Explanation:
Here, we can find pOH first:
pOH =
= 3.886.
Then, we can find pH which is 14 - pOH. We then get the answer above.
Answer:
69.7% is percent yield
Explanation:
Based on the reaction:
3Ca(NO3)2(aq) + 2Na3PO4(aq) → Ca3(PO4)2(s) + 6NaNO3(aq)
2 moles of Na3PO4 react producing 6 moles of NaNO3.
As 24.2 moles of Na3PO4 react, theoretical moles of NaNO3 produced are:
24.2 moles Na3PO4 * (6 moles NaNO3 / 2 moles Na3PO4) =
72.6 moles of NaNO3
As there are produced 50.6 moles of NaNO3, percent yield is:
50.6 moles NaNO3 / 72.6 moles NaNO3 =
<h3>69.7% is percent yield</h3>