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vivado [14]
3 years ago
8

Give reason:

Chemistry
1 answer:
Darya [45]3 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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Which event is an example of melting?
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A. Wax drips down the side of a lot candle.

Explanation:

The chemical change from solid to liquid. This is a combustion reaction, so carbon dioxide gas and water vapour is also produced but you can't see them

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3 years ago
Geologically, the Himalayan mountain range is one of the youngest mountain ranges on Earth. It has nine of the ten highest peaks
lyudmila [28]

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Wind deposits I think I remember learning this

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If the fugacity of a pure component at the conditions of an ideal solution is 40 bar and its mole fraction is 0.4, what is its f
yaroslaw [1]

Answer : The fugacity in the solution is, 16 bar.

Explanation : Given,

Fugacity of a pure component = 40 bar

Mole fraction of component  = 0.4

Lewis-Randall rule : It states that in an ideal solution, the fugacity of a component is directly proportional to the mole fraction of the component in the solution.

Now we have to calculate the fugacity in the solution.

Formula used :

f_i=X_i\times f_i^o

where,

f_i = fugacity in the solution

f_i^o = fugacity of a pure component

X_1 = mole fraction of component

Now put all the give values in the above formula, we get:

f_i=0.4\times 40\text{ bar}

f_i=16\text{ bar}

Therefore, the fugacity in the solution is, 16 bar.

4 0
3 years ago
Sickle cell is anemia is a deadly,recessive disease.How is sickle cell anemia inherited
vichka [17]

Autosomal recessive: cystic fibrosis (CF), sickle cell anemia (SC), Tay Sachs disease. Genes are inherited from our biological parents in specific ways. One of the basic patterns of inheritance of our genes is called autosomal recessive inheritance.

4 0
3 years ago
The weight of the body in the air is .... the weight of the submerged body
stira [4]

Answer:

the correct answer is option 'b': More than

Explanation:

The 2 situations are represented in the attached figures below

When an object is placed in air it is acted upon by force of gravity of earth which is measured as weight of the object.

While as when any object is submerged partially or completely in any fluid the fluid exerts a force in upward direction and this force is known as force of buoyancy and it's magnitude is given by Archimedes law as equal to the weight of the fluid that the body displaces, hence the effective force in the downward direction direction thus the apparent weight of the object in water decreases.

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3 years ago
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