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emmasim [6.3K]
4 years ago
11

Match the following terms with their definitions:

Chemistry
2 answers:
pogonyaev4 years ago
7 0

Explanation:

A mixture is defined as a substance in which two or more components are mixed together. Components in a mixture do not chemically combine together.

For example, sugar in water.

When solute particles completely and evenly mixed in a solvent then it is known as a homogeneous mixture. A homogeneous mixture is also known as a solution. For example, salt in water.

When solute particles are not evenly mixed in a solvent then it is known as a heterogeneous solution. For example, sand in water.

A compound is a substance in which two or more atoms are chemically combined together in a fixed ratio by mass. For example, CaCl_{2} is a compound.

Thus, we can conclude that given terms with their definitions are matched as follows.

1. Matter that is physically combined; has two forms of itself (homogeneous and heterogeneous) - Mixture.

2. A substance that that has uniform composition of two or more substances that cannot be seen - homogeneous mixture.

3. A substance that that has non-uniform composition of two or more substances that can be seen - heterogeneous mixture.

4. Substance composed of two or more elements bonded in a certain ratio by mass - Compound.

5. An example of a homogeneous mixture in a liquid form - solution.

stepan [7]4 years ago
6 0
Hi,

Homogeneous mixture 2
Heterogeneous 3
Mixture 1
Solution 5
Compound 4
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Answer:

CH2Cl2 mole fraction =  0.833

CH2Br2 mole fraction = 0.167

Explanation:

Step 1: Data given

Number of moles CH2Cl2 = 0.0300 moles

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Vapor pressure of pure CH2Cl2 = 133 torr

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Step 2:  Calculate mol fraction  in solution

Mol fraction CH2Cl2 = 0.0300 moles / (0.0300 + 0.0700)

Mol fraction CH2Cl2 = 0.300

Mol fraction CH2Br2 = 0.0700 moles / (0.0300 + 0.0700)

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Step 3: Calculate partial pressure

Partial pressure CH2Cl2 = 133 torr * 0.300 = 39.9 torr

Partial pressure CH2Br = 11.4 torr * 0.700 =7.98 torr

Step 4: Calculate the total pressure

total pressure = 39.9 + 7.98 = 47.88 torr

Step 5: Calculate mol fraction

partial pressure / total pressure = mole fraction

CH2Cl2 mole fraction = 39.9 / 47.88 = 0.833

CH2Br2 mole fraction = 7.98 / 47.88 = 0.167

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