The local weather station is predicting that a warm front will pass through Charlotte, NC in two days.
1 answer:
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Answer:
Hydrogen, 0,2 mol
Explanation:
= 22, 4 l/mol
V () = 6,72
= 6,72 l
V () = 6,72
= 6,72 l
The formula is:
n =
n () = 6,72l /22,4 l/mol = 0,3 mol
n () = 6,72l /22,4 l/mol = 0,3 mol (the same)
But from the equation we get a proportion that 1 mol () - 3 mol (
)
(we have more hydrogen than is need for the reaction)
So there is excess of
We only need = 0,1 mol (
)
0,3 mol (hydrogen quantity we have) - 0,1 mol (hydrogen quantity we need for the reaction) = 0,2 mol (excess)
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Answer:
Explanation:
Hello!
In this case, since the kinetics of the radioactive decay is assumed to be first-order, it is possible to use the following equation to quantify that change:
Thus, given the elapsed time, 635 years, and the half-life, 1599 years, we can compute the fraction of the present amount:
Thus, the percent is:
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