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3 years ago

What is melting point depression?and when it accurse?

2 answers:

7 0

A melting point is the characteristic physical property of a substance. So melting point analysis is one of the simplest and most useful techniques for identifing of a chemical substance. Melting point analysis can also provide information about the purity of a sample. A substance containing soluble impurities usually melts at a lower temperature than the pure compound. It can also melt over a wide range of temperatures. The smaller the range of melting temperatures, the higher the purity of the sample.

ASHA 777 [7]3 years ago

4 0

Answer:

melting point depression of the phenomenon of reduction of the melting point of a material with reduction of its size. the phenomenon is very prominent in nenoscale material, which melt at temperatures hundreds of degrees lower then bulk materials

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E. Top soil is fertile reason

Lady_Fox [76]

Answer:

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Topsoil consists of most weathered mineral and organic material. Biological agents are also responsible for the breakdown of complex organic matter which releases simple nutrients. This process of mineralisation make soil fertile.

Explanation:

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2 years ago

Let this be an easy 5 points for your brainly account all is ask for in return is a "thank you"

Svet_ta [14]

Answer:

The number of neutrons present in one atom of isotope of Silicon of mass 28 amu is 14 neutrons

Explanation:

Symbol of Si isotope

$_{14}^{28}\textrm{Si}$

Number of Neutron = Mass number - Atomic Number

Mass number = Total number of protons and neutrons present in the nucleus of the atom.For Si = 28 amu

Atomic Number = Total number of Protons present in the nucleus.

Si = 14

Number of neutron = 24 - 14

= 14

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3 years ago

In your own words, explain how multiple approaches to a scientific investigation can be used to obtain the same result. Provide

aleksandr82 [10.1K]

Answer:B

Explanation:

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2 years ago

The solid form of a substance is usually more dense than its liquid and gaseous forms. Similarly the liquid form is usually more

solniwko [45]

The solid form of a substance is usually more dense than its liquid and gaseous forms. Similarly the liquid form is usually more dense than the gaseous form. Ice floating in water is an exception that breaks the general density rule. So option “A” is the correct option in regards to the given question. In case of ice formation, actually the density of water decreases by about 9%. This is the main reason behind ice floating in water. Pure water has the maximum density at 4 degree centigrade.

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3 years ago

Our solar system consits of eight planets. Which phrase correctly describes a planet?

bearhunter [10]

B. (twenty characters blah blah blah) Have a great day/night!

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2 years ago

Read 2 more answers