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tensa zangetsu [6.8K]
3 years ago
8

How many grams of Neon are there in a 346 mL container at 40.5°C and 842 torr? With steps!

Chemistry
1 answer:
posledela3 years ago
3 0

Answer:

Mass of neon = 0.3 gram

Explanation:

Given:

Pressure = 842 torr

Temperature = 40.5°C = 313.5 K

Volume = 356 ml = 0.346 l

Find:

Mass of neon

Computation:

Gas constant R = 62.363

Number of mole = (842)(0.346)/(62.636)(313.5)

Number of mole = 0.015 (Approx)

Molar mass of neon is 20 g/ml

So,

Mass of neon = 20 x 0.015

Mass of neon = 0.3 gram

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You plan to separate a polar and a non-polar compound using normal phase column chromatography technique. Methylene chloride (CH
marissa [1.9K]

Answer:

Hexane should be used first.

Explanation:

Chromatography is a method of separating the constituents of a mixture by taking advantage of their different rates of movement in a solvent over an adsorbent medium. Chromatography is a means of separation and analysis that utilises fractional separation. It is based on the principle  that if a fluid containing a number of substances is allowed to pass though an adsorbent medium, the different substances in the fluid may travel at different rates and be separated.

The rate of movement depends on the relative affinities of the constituents for the solvent and adsorbent medium. i.e solutes which are weakly adsorbed by the adsorbent medium are easily redissolved by the ascending solvent and quickly travel up the adsorbent medium. In addition to that , solutes which are very soluble in the solvent move up at a faster rate than those which  are not soluble.

In column Chromatography;

A non-polar solvent should be initiated and applied first. This is because , in a column chromatography, a non-polar compound will be removed at first then later polar compound.

Assuming a polar compound is used first, the polar compounds will be removed alongside with all the non-polar compounds.

From the two Compounds given;

We know that :

Hexane is a non-polar compound and Methylene chloride  is a polar compound. As such, Hexane should be used first.

3 0
3 years ago
6. Calculate the mass of each product when 100.0 g of CuCl react according to the reaction
gavmur [86]

Answer:

67.91 g of CuCl2; 32.09 g of Cu.

Explanation:

The two masses add to 100.0 g, the initial amount of starting material, demonstrating the law of conservation of matter.

6 0
3 years ago
Which of the following would increase the strength of an electromagnet? Check all that apply.
TiliK225 [7]

Answer: The correct statements are ; A and B.

Explanation:

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\mu = Relative permeability

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I = Current in the wire of the solenoid

L = length of the solenoid or electromagnetic

As we can see from the formula:

B\propto N

B\propto I

So, by increasing the turns and increasing current flowing through wire one can increase the strength of an electromagnet.

Hence, the correct statements are ; A and B.

5 0
3 years ago
What is the number of atoms in 3.75 mol fe
Kruka [31]
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3.75mol= 6.022x3.75x10^23 atoms
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8 0
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Which of the following are considered pure substances?
Helen [10]
B.Elements

Explanation: they cannot be separated
8 0
3 years ago
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