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2 years ago

7

Is it fair that some scientists have received more credit than others for their work on the development of the periodic table? W

hy or why not? Be sure to explain your reasoning.
PLEASE GIVE ME A ANSWER...

1 answer:

Gre4nikov [31]2 years ago

6 0

Yes because some work harder than others to get their credit for developing the periodic table

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How do protons, neutrons, and electrons differ in charge?

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2 years ago

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

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Answer:

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

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The mass of the racemic mixture = 3 g

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S enantiomer = 1.5 g

Amount of Pure R = 10 g

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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>

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2 years ago

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