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emmasim [6.3K]
4 years ago
5

Explain why we perform a "self-condensation" here. what would happen if we used one molar equivalent of ethylphenylacetate and o

ne molar equivalent of methylphenylacetate?
Chemistry
1 answer:
Alina [70]4 years ago
3 0
 Self-condensation is a natural response in which a synthetic compound containing a carbonyl gathering acts both as the electrophile and the nucleophile in an aldol condensation. A condensation response in which two of a similar atom are consolidated. This aldol condensation is a self-condensation response since two particles of CH3)2CO consolidate to frame the item. This blended Claisen buildup is not a self-condensation response in light of the fact that the two ester reactants are not indistinguishable.
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What is the more reactive metal CA or Ra
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Ra (radium) is the most reactive
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Calculate the half-life (in s) of a first-order reaction if the concentration of the reactant is 0.0576 M 17.1 s after the react
garik1379 [7]

Answer:

66.7s

Explanation:

Let's bring out the parameters we were given...

Half life = ?

Initial Concentration = 0.0576 M

Final Concentration = 0.0249 M

Time for the concentration change to occur = 97.8s - 17.1s = 80.7s

Formular for half life (t1/2) is given as;

t1/2 = ln2 / k   ≈   0.693 / k

where k = rate constant

From the formular of first order reactions;

ln[A] = ln[A]o − kt

where [A] = Final Concentration and [A]o = Initial Concentration

Inserting the values, we have;

ln(0.0249) = ln(0.0576) - k(80.7)

Upon solving for k, we have;

-0.8387 = -k(80.7)

k = 0.01039 s−1

t1/2 = 0.693 / k = 0.693 / 0.01039 = 66.7s

7 0
3 years ago
A small hummingbird flying around beats its wings with a frequency of 170 Hz. If the wavelength of the sound wave produced is 2
bearhunter [10]

The given information in the question is :

Frequency = 170 Hz

1 Hz = \frac{1}{s}

Frequency = 170 \frac{1}{s}

Wavelength given = 2 m

Speed is unknown which we need to calculate.

Speed can be calculated by using the formula : Speed = wavelength X frequency

By plugging the value of wavelength and frequency in the above formula we get :

Speed = (2m)\times (170\frac{1}{s})

Speed = 340\frac{m}{s}

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3 years ago
The use of microorganism in our day to day life is.................
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Explanation:

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3 years ago
The standard enthalpy of formation of BrCl(g) is 14.7 kJmol-1 . The standard enthalpies for the atomization of Br2(l) and Cl2(g)
natita [175]

Explanation:

Equation of the reaction:

Br2(l) + Cl2(g) --> 2BrCl(g)

The enthalpy change for this reaction will be equal to twice the standard enthalpy change of formation for bromine monochloride, BrCl.

The standard enthalpy change of formation for a compound,

ΔH°f, is the change in enthalpy when one mole of that compound is formed from its constituent elements in their standard state at a pressure of 1 atm.

This means that the standard enthalpy change of formation will correspond to the change in enthalpy associated with this reaction

1/2Br2(g) + 1/2Cl2(g) → BrCl(g)

Here, ΔH°rxn = ΔH°f

This means that the enthalpy change for this reaction will be twice the value of ΔH°f = 2 moles BrCl

Using Hess' law,

ΔH°f = total energy of reactant - total energy of product

= (1/2 * (+112) + 1/2 * (+121)) - 14.7

= 101.8 kJ/mol

ΔH°rxn = 101.8 kJ/mol.

8 0
4 years ago
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