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3 years ago

Anyone can help? This will be really appreciated! 35 POINTS!!

Chemistry

2 answers:

Vlad1618 [11]3 years ago

8 0

Answer: 5. You can go 343.2 miles 6. 840960 minutes in a 1.6 years

Hope that helps :)

lara [203]3 years ago

7 0

Answer: 5. You can go 343.2 miles 6. 840960 minutes in a 1.6 years Maybe that works

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When you have a chemical reaction, it means something goes wrong with your chemicals.

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Which form of energy is converted to thermal energy when propane burns in air?

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Chemical because the propane has stored chemical energy which is being released and a by-product of that propane is heat or themal energy.

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3 years ago

What is the molarity of a solution that contains 14 moles of solute and 2 liters of solution?

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Answer:

7 M

Explanation:

The molarity is defined as "moles per liter." Here, it is ...

(14 moles)/(2 liters) = 7 moles/liter = 7 M

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3 years ago

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milliliters

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3 years ago

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Mixtures of benzene and cyclohexane exhibit ideal behavior. A solution was created containing 1.5 moles of liquid benzene and 2.

goblinko [34]

Answer:

Vapour pressure of cyclohexane at 50°C is 490torr

Vapour pressure of benzene at 50°C is 90torr

Explanation:

Using Raoult's law, pressure of a solution is defined by the sum of the product sbetween mole fraction of both solvents and pressure of pure solvents.

$P_{solution} = X_{A}P^0_{A}+X_{B}P^0_{B}$

In the first solution:

$X_{cyclohexane}=\frac{2.5mol}{2.5mol+1.5mol} =0.625$

$X_{benzene}=\frac{1.5mol}{2.5mol+1.5mol} =0.375$

$340torr = 0.625P^0_{A}+0.375P^0_{B}$ (1)

For the second equation:

$X_{cyclohexane}=\frac{3.5mol}{3.5mol+1.5mol} =0.700$

$X_{benzene}=\frac{1.5mol}{3.5mol+1.5mol} =0.300$

$370torr = 0.700P^0_{A}+0.300P^0_{B}$ (2)

Replacing (2) in (1):

$340torr = 0.625P^0_{A}+0.375(1233.3-2.333P^0_{A})$

$340torr = 0.625P^0_{A}+462.5-0.875P^0_{A}$

-122.5torr = -0.250P°A

$P^0_{A} = 490 torr$

Vapour pressure of cyclohexane at 50°C is 490torr

And for benzene:

$370torr = 0.700*490torr+0.300P^0_{B}$

$P^0_{B}=90torr$

Vapour pressure of benzene at 50°C is 90torr

3 0

3 years ago