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kow [346]
3 years ago
8

Two students are given the starting material benzoic acid and are asked to prepare benzaldehyde. The first student starts by ref

luxing her sample of benzoic acid in thionyl chloride in the fume hood. Upon completion of the reaction, she evaporates the thionyl chloride to isolate compound A. She treats compound A with a stoichiometric amount of lithium tri-tert-butoxyaluminum hydride at –78 °C in diethyl ether, producing compound B. Adding water, she isolates her product, compound C. The second student takes a different route. She treats benzoic acid with an excess of lithium aluminum hydride (LAH) in diethyl ether, followed by careful addition of ethyl acetate to remove any unreacted LAH. She adds water and isolates her product, compound D. Draw the structure for compound A, compound C, and compound D below.

Chemistry
1 answer:
Likurg_2 [28]3 years ago
5 0

Answer:

Compound A: Benzoyl chloride

Compound B: Benzaldehyde - (tBuO)₃Al complex

Compound C: Benzaldehyde

Compound D: Benzyl alcohol

Explanation:

The lithium tri-tert-butoxyaluminum hydride that the first student used is a milder reagent than LAH and will stop reacting at the aldehyde.

The LAH that the second student used is much more reactive and will continue to reduce the benzoic acid as far as possible, going all the way to the alcohol.

See the attachment for the reaction steps.

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snow_lady [41]

Answer:

<h2>3.31 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 23.2 g

volume = final volume of water - initial volume of water

volume = 62 - 55 = 7 mL

We have

density =  \frac{23.2}{7}  \\  = 3.314285

We have the final answer as

<h3>3.31 g/mL</h3>

Hope this helps you

8 0
3 years ago
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ASHA 777 [7]

Answer: The moles of melatonin are 0.000043

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

Given mass of melatonin = 0.01 g

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\text{Number of moles of melatonin}=\frac{0.01 g}{232.28g/mol}=0.000043mol

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4 0
3 years ago
How many atoms are present in 0.035 moles?
RUDIKE [14]

Answer:

2.11x10^{22}atoms

Explanation:

Hello!

In this case, considering the Avogadro's number, which relates the number of particles and one mole, we can infer that 1 mole of any element contains 6.022x10²³ atoms as shown below:

\frac{6.022x10^{23}atoms}{1mol}

Thus, we compute the number of atoms in 0.035 moles as shown below:

atoms=0.035mol*\frac{6.022x10^{23}atoms}{1mol} \\\\atoms=2.11x10^{22}atoms

Best regards!

7 0
3 years ago
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pochemuha
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7 0
3 years ago
What are the coefficients for the reaction _Cl2O5 + _H2O → _HClO3 once it is balanced?
muminat

Answer:

1, 1, 2

Explanation:

5 0
3 years ago
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