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lana [24]
3 years ago
8

Which terms are used to identify pure substances

Chemistry
2 answers:
Dafna11 [192]3 years ago
6 0

Answer:

Number 2:

Element and compound

Semenov [28]3 years ago
3 0

Answer:

Color, odor, density, melting temperature, boiling temperature, and solubility are examples of physical properties. Physical properties can be used to identify a pure substance.

Explanation:

please mark brainliest! :)

and have a great day! :>

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The density of a 45.0 mass % solution of ethanol (C2H5OH) in water is 0.873 g/mL. What is the molarity of the solution?
antoniya [11.8K]

Answer : The concentration of solution is, 8.53 M.

Explanation :

As we are given, 45.0 mass % solution of ethanol in water that means 45.0 g of ethanol present in 100 g of solution.

First we have to calculate the volume of solution.

\text{Volume of solution}=\frac{\text{Mass of solution}}{\text{Density of solution}}

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Now we have to calculate the molarity of solution.

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Volume of solution = 114.5 mL

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Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Mass of }C_2H_5OH\times 1000}{\text{Molar mass of }C_2H_5OH\times \text{Volume of solution (in mL)}}

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

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Therefore, the concentration of solution is, 8.53 M.

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