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3 years ago

What is the volume of 45g of benzene, C6H6 at 100°C and 250 Torr?

Chemistry

1 answer:

Anna11 [10]3 years ago

4 0

Answer:

V = 53.82 L

Explanation:

Given data:

Mass of benzene = 45 g

Temperature = 100°C (100+273 = 373 K)

Pressure = 250 torr (250/760 = 0.33 atm)

Volume of benzene = ?

Solution:

Number of moles of benzene:

Number of moles = mass /molar mass

Number of moles = 45 g/ 78.11 g/mol

Number of moles = 0.58 mol

Volume of benzene:

PV = nRT

V = nRT/P

V = 0.58 mol × 0.0821 atm.L/mol.K × 373 k / 0.33 atm

V = 17.76 atm.L /0.33 atm

V = 53.82 L

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3 years ago

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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.

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

$\text{Volume of solution}=\frac{100g}{0.873g/mL}=114.5mL$

Now we have to calculate the molarity of solution.

Mass of $C_2H_5OH$ = 45.0 g

Volume of solution = 114.5 mL

Molar mass of $C_2H_5OH$ = 46.07 g/mole

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:

$\text{Molarity}=\frac{45.0g\times 1000}{46.07g/mole\times 114.5mL}=8.53mole/L=8.53M$

Therefore, the concentration of solution is, 8.53 M.

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3 years ago

Would the solubility for a substance increase by dissolving the solute with more water?

garik1379 [7]

Answer: Yes

Explanation:

With more water, the molecules of the substance have more water molecules to form bonds with, thus they are dissolved even faster at that same particular temperature.

For example: a mildly soluble substance like powdered milk get more dissolved in your teacup as water, the solvent is increased

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3 years ago