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4 years ago

Which one of the following is an attribute for an extracting solvent?

Chemistry

1 answer:

PSYCHO15rus [73]4 years ago

7 0

Answer:

The answer is B

[The extracting solvent should be non-toxic and readily available]

Explanation:

The extracting solvent should not pose a risk to life (or the risk have to be minimum) and be available in large quantity.

A. Most of the extracting solvents are volatile, and is a good think because you can remove them by distillation.

C. The extraction solvent should <u>not</u> react with the solute, because you lose the extracted compound.

D. The extraction solvent should <u>not</u> be miscible with water. Usually you extract compounds organic compounds from water using an appropriate extracting solvent.

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What volume in litres will 38gr of F2 occupy at 0.999 bar and 273 K

FrozenT [24]

Answer:

$V=22.68L$

Explanation:

Hello,

In this case, we use the ideal gas equation to compute the volume as shown below:

$PV=nRT\\\\V=\frac{nRT}{P}$

Nonetheless we are given mass, for that reason we must compute the moles of gaseous fluorine (molar mass: 38 g/mol) as shown below:

$n=38 g *\frac{x}{y} \frac{1mol}{38 g} =1mol$

Thus, we compute the volume with the proper ideal gas constant, R:

$V=\frac{1mol*0.083\frac{bar*L}{mol*K}*273K}{0.999bar} \\\\V=22.68L$

Best regards.

7 0

3 years ago

While doing a lab a student found the density of a piece of pure aluminum to be 2.85 g/cm3 the accepted value for the density of

____ [38]

Answer:

THE PERCENT ERROR IS 5.55 %

Explanation:

To calculate the percent error, we use the formula:

Percent error = Found value - accepted value / accepted value * 100

Found value = 2.85 g/cm3

Accepted value = 2.70 g/cm3

Solving for the percent error, we have:

Percent error = 2.85 g/cm3 - 2.70 g/cm3 / 2.70 g/cm3 * 100

Percent error = 0.15 / 2.70 * 100

Percent error = 0.05555 * 100

Percent error = 5.55 %

In conclusion, the percent error is 5.55 %

3 0

4 years ago

A mixture of benzene and toluene has a total vapor pressure at 25°C of 45.06 mmHg. What is the partial pressure of benzene in th

SashulF [63]

Answer:

I just need points so ignore my answer and thanks

3 0

3 years ago

A nuclear reaction that causes a change in the nucleus of an atom of an element which converts the atom into another

beks73 [17]

Answer:

It might be "Radioactive Decay " check with someone to conform

Explanation:

7 0

3 years ago

Analysis of an unknown substance indicates that it is a brittle solid. It acts as an electrical insulator (does not conduct) as

Musya8 [376]

Answer:

KBr

Explanation:

A metal has a very high melting point. Aluminum is a metal.

Ionic solids do not conduct electricity in the solid state. However, when the solids are melted, they conduct electricity.

KBr is an ionic substance, it can only conduct electricity in molten form because the ions are locked up in the solid.

5 0

3 years ago