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stepan [7]
3 years ago
11

The following characteristics describe which of these terms? The substance is uniform in appearance and each part of the mixture

contains a combination of different ingredients in different ratios.
1. homogeneous mixture
2. heterogeneous mixture
3. pure substance
4. solution
Chemistry
1 answer:
larisa86 [58]3 years ago
7 0
100% Homognious mixture.... When something is uniform in appearance it means it's THE SAME.... Homo means "Alike" and "different ingrediantes" means MIXTURE.... not puresubstance...

HOPE THIS HELPS 

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What is the mole fraction of NaCl in a mixture containing 7.21 moles NaCl, 9.37 moles KCL, and 3.42
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Answer : The mole fraction of NaCl in a mixture is, 0.360

Explanation : Given,

Moles of NaCl = 7.21 mole

Moles of KCl = 9.37 mole

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Now we have to calculate the mole fraction of NaCl.

\text{Mole fraction of }NaCl=\frac{\text{Moles of }NaCl}{\text{Moles of }NaCl+\text{Moles of }KCl+\text{Moles of }LiCl}

Now put all the given values in this formula, we get:

\text{Mole fraction of }NaCl=\frac{7.21}{7.21+9.37+3.42}=0.360

Therefore, the mole fraction of NaCl in a mixture is, 0.360

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A Claisen reaction is a nucleophilic substitution in which an enolate is the nucleophile. It's typically a reaction of two molecules of an ester to form a β-keto ester, in the presence of an alkoxide base. Thus, a Claisen reaction is simply a characteristic condensation reaction of esters through a nucleophilic carbonyl substitution with an enolate such as a ketone enolate or an ester enolate.

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