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2 years ago

Alcohol and water have different boiling points. Which method would you use to separate them

Chemistry

2 answers:

zheka24 [161]2 years ago

5 0

Answer:

Distillation.

Explanation:

Distillation is the separation technique which can be used for separation of any two liquids of different boiling points.

The boiling point of water is near 100 degree celsius while that of alcohol is less than it.

So if we separate them with distillation, then alcohol will separate out first.

If two liquids have close boiling points then we can use fractional distillation.

eimsori [14]2 years ago

3 0

Distillation method would be a good method.

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<span>polar, Hadley, Ferrel, polar, Hadley, Ferrel. I hope this helps you.</span>

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2 years ago

Which two changes of state can be caused by removing thermal energy from a substance? choose two

crimeas [40]

Answer:

B and C

Explanation:

The correct answer is Condensation and Deposition

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3 years ago

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In the following overall chemical reaction, aluminum displaces chromium from chromium(III) oxide and forms aluminum oxide.

mafiozo [28]

Answer:

Change in enthalpy for the reaction is -536 kJ

Explanation:

Overall chemical reaction can be represented a summation of two given elementary steps with slight modification.
Take reaction (1a) and divide stoichiometric coefficients by 2
Take reverse reaction (2a) and divide stoichiometric coefficient by 2
Then add these two modified elementary steps to get overall chemical reaction
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$2Al+\frac{3}{2}O_{2}\rightarrow Al_{2}O_{3}.....\Delta H_{1}=\frac{-3351.4}{2}kJ=-1675.7kJ$

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$2Al+Cr_{2}O_{3}\rightarrow 2Cr+Al_{2}O_{3}....\Delta H=\Delta H_{1}+\Delta H_{2}=-1675.7+1139.7kJ=-536kJ$

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3 years ago

All molecules are made up of: <br> A)hydrogen <br> B)minerals <br> C)atoms <br> D)gas

masya89 [10]

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2 years ago

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a factor of 8, it means that A is now only 1/8 of its original concentration. A first order reaction, where A → products, has a

Trava [24]

Answer:

It takes 1.32x10⁻⁷s for the concentration of A to fall by a factor of 8

Explanation:

The equation that represents a first-order kinetics is:

Ln ([A] / [A]₀] = -kt

<em>Where [A] is actual concentration, [A]₀ is initial concentration, K is rate constant (For the given problem, 1.57x10⁷s⁻¹ and t is time.</em>

<em />

As you want the time when you have [A] in a factor of 8 = [A] / [A]₀ = 1/8

Replacing:

Ln ([A] / [A]₀] = -kt

Ln (1/8) = -1.57x10⁷s⁻¹*t

t = 1.32x10⁻⁷s

<h3>It takes 1.32x10⁻⁷s for the concentration of A to fall by a factor of 8</h3>

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2 years ago