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3 years ago

An aqueous solution of sodium chloride is best classified as a

2 answers:

5 0

♥ (2) homogeneous mixture
-This is because
-An aqueous solution of sodium chloride is best classified as a homogeneous mixture.
⇒As stated above, the correct answer is B

sergiy2304 [10]3 years ago

5 0

An aqueous solution of sodium chloride is best classified as $\boxed{\left( 2 \right){\text{ homogeneous mixture}}}$ .

Further Explanation:

Element

A substance that cannot be broken down chemically is known as an element. It contains only one kind of atoms in it. Examples of elements are hydrogen, carbon, and oxygen.

Compound

The substance formed by the chemical combination of two or more atoms is called a compound. Since these are composed of different elements, these can further be broken down into its constituents. The constituent particles lose their properties after the formation of compounds. Examples of compounds are NaCl, $\text{NH}_3$ and $\text{H}_2\text{O}$ .

Mixture

It is the combination of two or more substances together, but not by chemical means. The constituent particles retain their properties even after the formation of the mixture. Mixtures do not have a fixed formula and these have variable composition. Examples of mixtures are saline solution, concrete, and sand.

Classification of mixture:

1. Homogeneous mixtures

“Homo” means “same”. The mixtures that have the same or uniform composition throughout are termed as homogeneous mixtures. Such mixtures exist in a single phase. Examples of homogeneous mixtures are air, orange juice, and blood.

2. Heterogeneous mixtures

“Hetero” means “different”. The mixtures that have different or non-uniform composition throughout are termed as heterogeneous mixtures. Such mixtures have two or more phases. Examples of heterogeneous mixtures are ice cubes in cola, sand and sugar, and soda.

Sodium chloride is an ionic compound that consists of $\text{Na}^+$ and $\text{Cl}^+$ ions. Water is a polar molecule as it contains $\text{H}^+$ and $\text{OH}^-$ ions in it. So NaCl dissolves in water completely and its aqueous solution exists in a single phase. Therefore, an aqueous solution of NaCl is a homogeneous mixture and option (2) is the correct answer.

Learn more:

Characteristics of a mixture: brainly.com/question/1917079
Example of physical change: brainly.com/question/1119909

Answer details:

Grade: High School

Chapter: Elements, compounds, and mixtures

Subject: Chemistry

Keywords: mixture, element, compound, NaCl, Na+, Cl-, single phase, sodium chloride, same, different, composition, homogeneous mixtures, heterogeneous mixtures.

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3 years ago

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Calculate the number of moles of an ideal gas if it occupies 1750 dm3 under 125,000 pa at a temperature of 127 c. a. 0.21 moles

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The number of mole will be 65.81 mole.

An ideal gas would be one for which both the overall volume of the molecules and even the forces that exist between them are so negligible as to have no influence on the behavior of something like the gas.

Number of ideal gas can be calculated by using the formula:

PV = nRT

where, p is pressure, n is number of mole, R is gas constant and T is temperature.

Given data:

V= 1750 $dm^{3}$ = 1750 L

P = 125,000 p = 1.2 atm

R = 0.082 L /mole kelvin

T = 273+127 = 400 K

Now, put the value of given data in above equation.

1.23atm x 1750L = n x 0.0820atm x Liter/ mole x kelvin x 400K

n = 65.81 mole.

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