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Zolol [24]
2 years ago
12

Is the process represented below an example of a physical or a chemical

Chemistry
1 answer:
Basile [38]2 years ago
6 0
It is a physical change because only the states as being changes, not the actual bonds in the compound.
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Where is most of Earth's fresh water found?
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in the ground near the poles hope that helps

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Which of the following combinations of information would allow you to calculate concentration in ppmv? Check all that apply. mol
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Explanation:

-mass of solute, density of solute, and volume of solution

-volume of solute, mass of solution, and density of solution

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Weeks and how much money, in dollars, Jamal deposits into the savings account.
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An aqueous solution containing 10 g of an optically pure compound was diluted to 500 mL with water and was found to have a speci
lapo4ka [179]

Answer:

<u>Optical purity = 76.9231 %</u>

<u>Specific rotation of mixture = - 97.6923 °</u>

Explanation:

The mass of the racemic mixture = 3 g

It means it contains R enantiomer = 1.5 g

S enantiomer = 1.5 g

Amount of Pure R = 10 g

Total R = 11.5 g

Total volume = 500 mL + 500 mL = 1000 mL = 1 L

[R] = 11.5 g/L

[S] = 1.5 g/L

Enantiomeric excess = \frac {Excess}{Total\ Concentration}\times 100 = \frac {11.5-1.5}{11.5+1.5}\times 100 = 76.9231 %

<u>Optical purity = 76.9231 %</u>

Also,

Optical purity = \frac {optical\ rotation\ of\ mixture}{optical\ rotation\ of\ pure\ enantiomer}\times 100

Optical rotation of pure enantiomer = −127 °

76.9231=\frac {optical\ rotation\ of\ mixture}{-127^0}\times 100

<u>Specific rotation of mixture = - 97.6923 °</u>

6 0
3 years ago
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