A radioactive isotope of potassium (K) has a half-life of 20 minutes. If a 40.0 gram sample of this isotope is allowed to decay
2 answers:
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<h2>0.72 mol/L</h2>
Explanation:
We are given a solution which contains
of
.
To calculate number of moles of present, we need to find it's molar mass from charts. Molar Mass of
is known to be
.
Number of moles of present =
Molarity =
∴ Molarity of given solution =