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PSYCHO15rus [73]
3 years ago
11

What occurs only on the surface of the substance

Chemistry
1 answer:
alisha [4.7K]3 years ago
5 0
Evaporation occurs on the surface of a substance
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What is the boiling point of cyclohexane at 620 mmhg? can you show calculations?
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 Boiling point of cyclohexane at 620 mm hg?  

Standard atmospheric pressure is 760 mm Hg. Boiling point at 760 mm= 80.74˚C  

A liquid boils when its vapor pressure is equal to the atmospheric pressure. The vapor pressure of a liquid is proportional the absolute temperature of the liquid.  

As the atmospheric pressure decreases, less vapor pressure is needed to cause the liquid to boil. Less vapor pressure means lower temperature.  

The boiling point of cyclohexane at 620 mm Hg is less than 80.74˚C



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Calculate the volume of a 0.5M solution containing 20g of NaOH
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Answer:

1L

Explanation:

First, let us calculate the number of mole present in 20g of NaOH. This is illustrated below:

Mass = 20g

Molar Mass of NaOH = 23 + 16 + 1 = 40g/mol

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From the question given, we obtained the following data:

Molarity = 0.5M

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If the mass of 23 gummi bears is 49.2g, what is the average mass of one gummi bear? Round answer to the nearest 0.00g (do NOT ty
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