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shepuryov [24]
3 years ago
13

Will you obtain a pure solid in evaporation technique? Justify your answer

Chemistry
1 answer:
aniked [119]3 years ago
3 0

Evaporation technique is used to separate a compound dissolved in a solvent by vaporizing the solvent and converting it to gaseous state. This leaves behind the solid residue present in the solution after the pure solvent is vaporized. The solvent vapors can be collected and condensed to get pure solvent. But the solid residue cannot be considered pure as it is the left over solid after all the solvent is evaporated. If the solution has some impurities, the solid left over includes all of the impurities. So, we cannot obtain a pure solid in evaporation technique.

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Which of these statement(s) is/are true about a balloon filled with 1.00 mol N2 (g) at STP?
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Answer:

I. The balloon has a volume of 22.4L

III. The balloon contains 6.022x10^23 molecules.

Explanation:

At stp, it has been proven that 1mole of a gas occupy 22.4L.

Therefore, option (i) is correct.

The molar mass N2 = 14.01 x 2 = 28.02g/mol

Number of mole of N2 = 1 mole

Mass of N2 =..?

Mass = mole x molar Mass

Mass of N2 = 1 x 28.02 = 28.02g.

The mass content of the balloon is 28.02g, therefore, option (ii) is wrong.

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02x10^23 molecules. This implies that 1 mole of N2 also contains 6.02x10^23 molecules

Therefore, option (iii) is correct.

The correct options to the question are:

Option i and option iii

7 0
3 years ago
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Which of the changes gas to solid gas to liquid, liquid to solid liquid to gas,solid to liquid solid to gas will involve an outp
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Answer:

Liquid to solid liquid to gas

Explanation:

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7 0
2 years ago
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castortr0y [4]

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Consider a pot of water at 100 C. If it took 1,048,815 J of energy to vaporize the water and heat it to 135 C, how many grams of
jeka57 [31]

Answer:

There was 450.068g of water in the pot.

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Latent heat of vaporisation = 2260 kJ/kg = 2260 J/g = L

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Let m = x g be the weight of water in the pot.

Energy required to vaporise water = mL = 2260x

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2330.35x=1048815\\x=450.068g

Hence, there was 450.068g of water in the pot.

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3 years ago
Classify each of the following properties by writing physical or chemical matter
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1. Physical matter
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3. Physical matter
4. Physical matter
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