Which statement describes KCl(aq)?
1 answer:
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Answer: The mole fraction of hexane is 0.617
Explanation:
According to Raoult's law, the vapor pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the vapor pressure of that component in the pure state.
and
where, x = mole fraction in solution
= pressure in the pure state
According to Dalton's law, the total pressure is the sum of individual pressures.
Thus mole fraction of hexane is (1-0.383) = 0.617 .
Answer:
The answer is
<h2>4318.94 moles</h2>Explanation:
To find the number of moles of 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
N = 2.60x10^27 atoms of boron
The number of moles is
We have the final answer as
<h3>4318.94 moles</h3>Hope this helps you