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Fofino [41]
3 years ago
13

How is a pure substance different from a mixture?

Chemistry
2 answers:
Troyanec [42]3 years ago
8 0

Answer:

A pure substance is different from a mixture in that <u><em>mixtures are made up of more than on component</em></u>

Explanation:

A pure substance is a substance that is homogeneous and invariable (fixed), and it is not possible to separate or divide it into more substances. For example, water has the formula H2O and is always the same. This indicates that it is formed by molecules in which there are 2 hydrogen atoms and 1 oxygen atom. If I changed that formula, it would be another different substance.

A pure substance cannot be broken down into other simpler substances using physical methods.

A pure substance has its own or defined characteristic properties.

A pure substance can be both a chemical element and a compound, which are formed by atoms or molecules of the same nature.

On the other hand, a mixture is the union of two pure substances or compounds (which have their individual properties), and have a variable chemical composition. They can be separated by chemical or physical means and obtain the components that form the mixtures. They are formed by atoms and molecules of different nature.

The mixtures can be homogeneous (whose composition and properties are uniform in any part of a given sample, such as sugar dissolved in water) or heterogeneous (those in which at a glance it is easy to identify the different components that make them up; for example water and oil or water and sand)

Given the above, it is possible to say that <u><em>a pure substance differs from a mixture in that mixtures are made up of more than on component</em></u>

svlad2 [7]3 years ago
3 0

b.) mixtures are made up of more than on component. A pure substance is like a diatomic element, like O2, while a mixture is more like a salad, and can be separated by physical means.

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3 years ago
The mole fraction of a non-electrolyte (MM 40.0 g/mol) in a saturated aqueous solution is 0.310. What is the molality of the sol
jeka57 [31]

<u>Answer:</u> The molality of non-electrolyte is 24.69 m

<u>Explanation:</u>

We are given:

Mole fraction of saturated aqueous solution = 0.310

This means that 0.310 moles of non-electrolyte is present.

Moles of water (solvent) = 1 - 0.310 = 0.690 moles

To calculate the mass from given number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Moles of water = 0.690 moles

Molar mass of water = 18 g/mol

Putting values in above equation, we get:

0.690mol=\frac{\text{Mass of water}}{18g/mol}\\\\\text{Mass of water}=(0.690mol\times 18g/mol)=12.42g

To calculate the molality of solution, we use the equation:

\text{Molality}=\frac{n_{solute}\times 1000}{W_{solvent}\text{ (in grams)}}

Where,

n_{solute} = Moles of solute (non-electrolyte) = 0.310 moles

W_{solvent} = Mass of solvent (water) = 12.42 g

Putting values in above equation, we get:

\text{Molality of non-electrolyte}=\frac{0.310\times 1000}{12.42}\\\\\text{Molality of non-electrolyte}=24.96m

Hence, the molality of non-electrolyte is 24.69 m

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The more particles a substance has at a given temperature, the more thermal energy is has. True or false?
klemol [59]
Its true :)
i take chemistry rn lol

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3 years ago
What is true about an element
stich3 [128]

Answer:

made from ine atom

Explanation:

one atom

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2 years ago
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