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3241004551 [841]
2 years ago
13

What starting compound and what reagents should be used for most efficient synthesis of 2-bromo-1-iso-propyl-4-nitrobenzene? Eff

icient synthesis means that on each step you take the major product or one of the major products and continue reacting it with assigned reagent further. The final product is must be major product of the reaction as well.
Select one:
A. Start with iso-propylbenzene First step: HNO,+H2S04 Second step: Br2+FeBr
B. Start with bromobenzene First step: HNO,+H2SO Second step: 2-chloropropane + AIC
C. Start with nitrobenzene First step: 2-chloropropane +AICI Second step: Br,+FeBr
Chemistry
1 answer:
nalin [4]2 years ago
5 0

Answer:

A

Explanation:

Alkyl substituents on benzene are ortho, para directing. They activate the benzene ring towards electrophilic substitution at the 2 and 4 positions. Nitration is an electrophilic addition to the benzene ring and will occur at the 2 and 4 positions. The para nitro product predominates due to steric effects. Bromine, being smaller than -NO2 can be directed to the ortho position. Hence te compound is formed

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Using the formula M1V1 = M2V2 , how many milliliters of a 2.50 M hydrochloric acid solution is required to make 100.0 mL of a 0.
olga nikolaevna [1]

30ml of a 2.50 M hydrochloric acid solution is required to make 100.0 mL of a 0.750 M solution.

<h3>What is HCl?</h3>

HCl is an acid which is made up of hydrogen and chlorine gas.

By the formula of dilution

M1V1 = M2V2

where V1 = 2.50 m

M2 = 100.0

V2 = 0.750 m

M1 × 2.50 m = 100.0 × 0.750 m

M1 = 30 ml

Thus, the M1 is 30 ml option a is correct.

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8 0
2 years ago
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Which type of energy would most likely create the worst environmental disaster from an accident or spill?
rewona [7]

Answer:

nuclear energy

Explanation:

6 0
3 years ago
Basically everything is in the picture, and i dont really understand please help.
zubka84 [21]
This is what I found

5 0
3 years ago
The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release
KATRIN_1 [288]

The mass of melted gold to release the energy would be  3, 688. 8 Kg

<h3>How to determine the mass</h3>

The formula for quantity of energy is given thus;

Q = n × HF

Where n represents number of moles

HF  represents  heat of fusion

To find the number of moles, we have

235.0 = n × 12.550

number of moles = \frac{235}{12. 550} = 18. 725 moles

Note that molar mass of Gold is 197g/ mol

Let's note that;

Number of moles = mass/ molar mass

Mass = number of moles × molar mass

Mass = 18. 725 × 197

Mass = 3, 688. 8 Kg

Thus, the mass of melted gold to release the energy would be  3, 688. 8 Kg

Learn more about molar heat of fusion here:

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8 0
1 year ago
A saturated solution of manganese(II) hydroxide was prepared, and an acid–base titration was performed to determine its KspKsp a
trapecia [35]

Answer:

10.945 x 10^-4

Explanation:

Balanced equation:

Mn(OH)2 +  2 HCl  -->  MnCl2  +  H2O

it takes 2 moles HCL for each mole Mn(OH)2

Next find the molarity of the Mn(OH)2 solution

= (1 mole Mn(OH)2 / 2 mole HCl)  X (0.0020 mole HCl / 1000ml) X (4.86 ml)    

= 4.86 x 10^-3 mole  

this is now dissolved in (70 + 4.86)  =  74.86 ml or 0.07486 L

thus [Mn(OH)2]  =  4.86 x 10^-3 mole / 0.07486 L  =  0.064921 M

Ksp =  [Mn2+][OH-]^2  =  4x^3  =  4(0.064921)^3  = 10.945 x 10^-4

6 0
3 years ago
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