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kumpel [21]
2 years ago
12

Reaction of ethylmagnesium bromide with which of the following compounds yields a primary alcohol after quenching with aqueous a

cid?
a. ethyl acetate
b. CH3CHO
c. (CH3)2CO
d. ethylene oxide
e. n- butyllithium
Chemistry
1 answer:
umka2103 [35]2 years ago
6 0

Answer

Option D

When a grignard Reagent reacts with Ethylene Oxide... A Primary Alcohol is Formed.

CH2OCH2 + RMgX ==> RCH2CH2OMgX

When You Hydrolyze

You have

RCH2CH2OH

The Text written below may come in handy someday.

Hope you find it helpful.

One of the preparation of Alcohols is via Reaction with "Grignard Reagents" .

Grignard Reagents have the formula "RMgX"

Where R is an alkyl group eg CH₃, C₂H₅ etc

X is a halogen eg Cl,Br etc

Ethylmagnesiumbromide fits the description of grignard Reagent from what I wrote above.

The formula for Ethylmagnesiumbromide is

"C₂H₅MgBr"

Now

When grignard reagents react with Alkanals... They form alcohols.

Note this trend.

When a grignard reagent reacts with Methanal(Formaldehyde)... It forms a Primary Alcohol.

When a grignard reagent reacts with any other Alkanal besides Methanal(formaldehyde) ... it forms Secondary Alcohols.

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Calculate the new pressure of a gas if the gas at 50 ˚C and 81.0 kPa is heated to 100 ˚C at a constant volume.
Debora [2.8K]

Answer:

93.5 kPa

Explanation:

Step 1: Given data

  • Initial pressure (P₁): 81.0 kPa
  • Initial temperature (T₁): 50 °C
  • Final pressure (P₂): ?
  • Final volume (T₂): 100 °C

Step 2: Convert the temperatures to the Kelvin scale

When working with gases, we need to consider the absolute temperature. We will convert from Celsius to Kelvin using the following expression.

K = °C + 273.15

T₁: K = 50°C + 273.15 = 323 K

T₂: K = 100°C + 275.15 = 373 K

Step 3: Calculate the final pressure of the gas

At a constant volume, we can calculate the final pressure of the gas using Gay-Lussac's law.

P₁/T₁ = P₂/T₂

P₂ = P₁ × T₂/T₁

P₂ = 81.0 kPa × 373 K/323 K

P₂ = 93.5 kPa

7 0
3 years ago
Which of the following is an example of poetential energy changing into kinetic energy ?
allsm [11]

B. A fruit falling from a tree.

4 0
3 years ago
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The substances below are listed by increasing specific heat capacity value. Starting at 30.0 °C, they each absorb 100 kJ of ther
timama [110]

Answer:

Silver, 0.239 J/(g °C)

Explanation:

  • The heat change is related to specific heat as given by the formula;

Heat change = mass of substance × specific heat × change in temperature

  • Therefore; considering same amount of substance or equal masses and have the same initial temperature.
  • The change in temperature will be inversely proportional to the specific heat.
  • Therefore; the higher the specific heat lower the temperature change.
  • Hence,  the change in temperature will be highest for the substance with the lowest specific heat.

Therefore; the one that will increase in temperature the most is Silver

7 0
3 years ago
1. a.) Calculate the wavelength of light which has a frequency of 5.25 x 10 14 Hz.
Scilla [17]
<h3>Answer:</h3>

5.71 × 10² nm

<h3>Explanation:</h3>

The product of wavelength and frequency of a wave gives the speed of the wave.

Therefore;

Velocity of wave = Wavelength × Frequency

c = f ×λ

In our case;

Frequency = 5.25 × 10^14 Hz

Speed of light = 2.998 × 10^8m/s

But;

λ = c ÷ f

  = 2.998 × 10^8m/s ÷  5.25 × 10^14 Hz

  = 5.71 × 10^-7 m

But; 1 M = 10^9 nm

Therefore;

wavelength = 5.71 × 10^-7 × 10^9

                  = 5.71 × 10² nm

The wavelength of light wave 5.71 × 10² nm

3 0
3 years ago
What is the answer to it
mr_godi [17]
what is the answer to what there is nothing here
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