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2 years ago

Give reason:

Chemistry

1 answer:

Darya [45]2 years ago

6 0

Answer:

a.The glass beads present in the fractionating column provide a large surface area for hot vapours to cool and condense repeatedly

b.Crystallization is better than evaporation because some solids can decompose or can get burned during evaporation

Explanation:

a.The fractionating column is fitted in the neck of the distillation flask containing the mixture of liquids to be separated

b. Also in some cases impurities can remain dissolved in the solution while evaporation which cannot be removed even after filtration

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What is the relationship between the number of gas particles and volume ?

choli [55]

Answer:

V ∝ n

Step-by-step explanation:

Suppose that pressure and temperature are constant.

If you try to force more molecules of air into a balloon, the balloon will expand.

This is an example of Avogadro's Law: the volume of a gas is directly proportional to the number of moles (particles).

V ∝ n

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2 years ago

PLSSS HELP ANYONE ASAP!

algol [13]

B I hope it’s right I don’t really help a lot but yeah lol

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2 years ago

Two common methods to generate an aldehyde is by oxidation of an alcohol and through ozonolysis.

kotykmax [81]

Answer:

a. True.

Explanation:

Only primary and secondary alcohols can oxidise to give an aldehyde. But a weak oxidizing agent must be used to prevent formation of a carboxylic acid or ketone.

weak oxidizing agents: Chromyl chloride, silver/oxygen/500°C

take an example of ethanol:

 ${ \bf{CH _{3} CH_{2}OH \: \: \frac{Ag/O_{2} }{500 \degree C} > \: \:CH _{3} CHO}}$ 

 ${ \sf{CH _{3} CHO \: \: is \: ethanal}}$ 

By ozonolysis:

Here, reactants are Ozone gas, Carbon tetrachloride at a temperature (<20°C), ethanoic acid, zinc and water.

take an example of propanol:

if it undergoes ozonolysis, it gives ethanal and methanal.

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2 years ago

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Explain how humans acquire the energy to function.Explain the process of cellular respiration and how we obtain this energy.

Naddika [18.5K]

Answer:

energy = heat = producers = consumer animals =

decomposers = heat

Explanation:

this is the best

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2 years ago

How many grams of sodium nitrate. NaNO3, are soluble in 100

natka813 [3]

Answer:

Your correct answer is D. 40 g

Explanation:

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2 years ago

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