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Ipatiy [6.2K]
3 years ago
10

(06.06 MC)

Chemistry
2 answers:
Gekata [30.6K]3 years ago
6 0

Answer:

its 3.12

Explanation:

RUDIKE [14]3 years ago
4 0

Answer:

Explanation:

3.12

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Which organic compound consists of the elements carbon, hydrogen, and oxygen and has carbon and hydrogen atoms in a 2:1 ratio?
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A) Maltose

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Maltose has the chemical formula of C12H22O11 which shows that it is composed of the elements carbon, hydrogen, and oxygen. Maltose also has carbon and hydrogen atoms in a 2:1 ratio.

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What's the mass of 30 ML of isopropanol<br><br> Plz help I'm so confused
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When swimmers push against the wall of a pool with their feet, they are pushed away from the wall. Which of Newton's laws explai
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One type of electromagnetic radiation which has more energy than infrared
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At 85°C, the vapor pressure of A is 566 torr and that of B is 250 torr. Calculate the composition of a mixture of A and B that b
Phantasy [73]

Answer:

Composition of the mixture:

x_{A} =0.652=65.2 %

x_{B} =0.348=34.8 %

Composition of the vapor mixture:

y_{A} =0.809=80.9%

y_{B} =0.191=19.1%

Explanation:

If the ideal solution model is assumed, and the vapor phase is modeled as an ideal gas, the vapor pressure of a binary mixture with x_{A} and x_{B} molar fractions can be calculated as:

P_{vap}=x_{A}P_{A}+x_{B}P_{B}

Where P_{A} and P_{B} are the vapor pressures of the pure compounds. A substance boils when its vapor pressure is equal to the pressure under it is; so it boils when P_{vap}=P. When the pressure is 0.60 atm, the vapor pressure has to be the same if the mixture is boiling, so:

0.60*760=P_{vap}=x_{A}P_{A}+x_{B}P_{B}\\456=x_{A}P_{A}+(1-x_{A})P_{B}\\456=x_{A}*(P_{A}-P_{B})+P_{B}\\\frac{456-P_{B}}{P_{A}-P_{B}}=x_{A}\\\\\frac{456-250}{566-250}=x_{A}=0.652

With the same assumptions, the vapor mixture may obey to the equation:

x_{A}P_{A}=y_{A}P, where P is the total pressure and y is the fraction in the vapor phase, so:

y_{A} =\frac{x_{A}P_{A}}{P}=\frac{0.652*566}{456} =0.809=80.9 %

The fractions of B can be calculated according to the fact that the sum of the molar fractions is equal to 1.

7 0
3 years ago
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