It asks for the percentage but I’m not sure how to find it when the answer is 67.1%
1 answer:
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Once upon a time there was a lovely
princess. But she had an enchantment
upon her of a fearful sort which could
only be broken by love's first kiss.
She was locked away in a castle guarded
by a terrible fire-breathing dragon.
Many brave knights had attempted to
free her from this dreadful prison,
but non prevailed. She waited in the
dragon's keep in the highest room of
the tallest tower for her true love
and true love's first kiss. (laughs)
Like that's ever gonna happen. What
a load of - (toilet flush)
Allstar - by Smashmouth begins to play. Shrek goes about his
day. While in a nearby town, the villagers get together to go
after the ogre.
Answer: The mass percentage of is 5.86%
Explanation:
To calculate the mass percentage of in the sample it is necessary to know the mass of the solute (
in this case), and the mass of the solution (pesticide sample, whose mass is explicit in the letter of the problem).
To calculate the mass of the solute, we must take the mass of the precipitate. We can establish a relation between the mass of
and
using the stoichiometry of the compounds:
Since for every mole of Tl in there are two moles of Tl in
, we have:
Using the molar mass of we have:
Finally, we can use the mass percentage formula: