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mr_godi [17]
3 years ago
5

When 4.96 g of a nonelectrolyte solute is dissolved in water to make 485 mL of solution at 27 °C, the solution exerts an osmotic

pressure of 827 torr. What is the molar concentration of
Chemistry
1 answer:
Bogdan [553]3 years ago
5 0

Answer:

concentration = 0.044 moles / L

Explanation:

The mass of non electrolyte solute dissolved in water =4.96 grams

The volume of water taken = 485mL = 0.485 L

the temperature = 27°C = 300 K

osmotic pressure = 827 torr = \frac{827}{760}atm=1.09atm

The osmotic pressure is related to molar concentration as:

osmotic pressure = concentration X R X T

Where

R = gas constant = 0.0821 L atm/molK

Putting values

1.09 = concentration X 0.0821 X 300

concentration = 0.044 moles / L

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Answer:

Number of moles = 10.6 mol

Explanation:

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Molar mass of H = 1.008 g/mol

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Number of moles of citric acid = ?

Solution:

Formula:

Number of moles = mass/molar mass

Now we will calculate the molar mass of citric acid:

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C₆H₈O₇ = 72.06 + 8.064+112

C₆H₈O₇ = 192.124g/mol

Number of moles = 2030 g/ 192.124g/mol

Number of moles = 10.6 mol

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The end of one bar magnet is placed near the end of another bar magnet. The two ends seem to push each other apart. Which of the
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Answer:

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If unlike poles of two bar magnets are made to face each other, the magnetic lines of force are now in the same direction therefore the unlike poles attract each other.

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