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3 years ago

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1-Propynyllithium reacts with (R,R)-2,3-dimethyloxacyclopropane in a stereoselective reaction. Draw a curved arrow mechanism and

the missing intermediate and product, clearly showing stereochemistry with a wedge and hashed bond at each stereocenter.

1 answer:

QveST [7]3 years ago

6 0

Answer:

Reference image attached

Explanation:

Please see the attached image.

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A powder sample weighing 250 g and having a surface area of 1 m2/g is dispersed in 1 L of water. After 10 minutes, 0.4 g of the

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Answer:

a)

$K = 2.64 * 10^{-8}$

b)

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Explanation:

Given

Surface Area (S) of 250 grams of powder sample $= 250$ square meter.

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$V\frac{dC}{dT} = \frac{dM}{dT} = \frac{0.40*60}{10} = 0.66$ mg per second

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a)

$\frac{dM}{dT} = K SC_s$

$0.66 = K* 2500000* 10\\$

$K = 2.64 * 10^{-8}$ cm /sec

b) Time taken

Time taken to sink

$\frac{10*60}{0.4} * 37.5 = 56,250$

Time in hours

$15 \frac{5}{8}$ hours

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