Which layer is least dense
2 answers:
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The question is incomplete. Complete question is read as:
'<span>One cup of fresh orange juice contains 115 mg of ascorbic acid (vitamin C, C6H8O6). Given that one cup = 218.0 mL calculate the molarity of vitamin C in organic juice.'
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Answer:
Given: weight of solute (ascorbic acid) = 115 mg = 0.115 g
Volume of solution = 218.0 mL = 0.218 L
Molecular weight of ascorbic acid = 176.12 g/mol.
Now, Molarity = </span>
=
<span> = 0.002995 mol/dm3
Answer: Molarity of solution = </span>0.002995 mol/dm3<span>
</span>
'<span>One cup of fresh orange juice contains 115 mg of ascorbic acid (vitamin C, C6H8O6). Given that one cup = 218.0 mL calculate the molarity of vitamin C in organic juice.'
..........................................................................................................................
Answer:
Given: weight of solute (ascorbic acid) = 115 mg = 0.115 g
Volume of solution = 218.0 mL = 0.218 L
Molecular weight of ascorbic acid = 176.12 g/mol.
Now, Molarity = </span>
=
<span> = 0.002995 mol/dm3
Answer: Molarity of solution = </span>0.002995 mol/dm3<span>
</span>
Answer:
= 2.94 atm
Explanation:
The total pressure () in the container is given by:
The pressure of the oxygen () and the pressure of the helium (
) can be calculated using the ideal gas law:
<u>Where</u>:
V: is the volume = 25.0 L
n: is the number of moles of the gases
R: is the gas constant = 0.082 Latm/(Kmol)
T: is the temperature = 298 K
First, we need to find the number of moles of the oxygen and the helium:
Where m is the mass of the gas and M is the molar mass
And the number of moles of helium is:
Now, we can find the pressure of the oxygen and the pressure of the helium:
Finally, the total pressure in the container is:
Therefore, the total pressure in the container is 2.94 atm.
I hope it helps you!