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]4 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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How many moles of carbon in 6.64 moles of CCl2 F

Bad White [126]

Answer: 6.64 moles of carbon.

Explanation:

Given data:

Number of moles of C = ?

Number of moles of CCl₂F₂ = 6.64 mol

Solution:

In one mole of CCl₂F₂ there is one mole of carbon two moles of chlorine and two moles of fluorine are present.

In 6.6 moles of CCl₂F₂ :

Moles of carbon = 6.64 × 1 = 6.64 moles of carbon.