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Naya [18.7K]
3 years ago
10

Question 4b, c please.

Chemistry
1 answer:
lora16 [44]3 years ago
4 0

Answer:

                   a) Structural formula for X and Y are attached below,

                   b) Systematic name of alcohol is Butan-2-ol.

                  c) X is secondary alcohol.

Explanation:

                    Alcohols are considered one of the most important class of organic compounds. They act as the starting materials in many important reactions like in synthesis of esters, ethers e.t.c.

                   Among different reactions shown by alcohols oxidation reactions are considered very important in formation of other intermediates like ketones, aldehydes and carboxylic acids.

Below are the oxidation reactions shown by different alcohols;

1) Primary Alcohol -------[O]-------->  Aldehyde   --------[O]--------> Carboxylic Acid

2) Secondary Alcohol --------[O]--------> Ketone -------[O]-------> No Reaction

3) Tertiary Alcohol ---------[O]---------> No reaction

Hence, oxidation takes place on alcohols which contain reactive C-H bonds. Therefore, in given scenario the alcohol is secondary alcohol and upon oxidation it produces a ketone.

Note:

In order to finalize the correct structure of final product we can assume that it is ketone because it is stated in statement that it cannot be oxidized further. Secondly the molar mass 72 g/mol was utilized to reach the final correct structure, for this purpose 28 amu (for CO carbonyl group) was subtracted from 72 and the remaining 44 amu was alloted to 2 CH₃ (Methyl part each having 15 amu mass) and CH₂ (Methylene part having 14 amu mass) respectively.

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The atomic structure of the atom contains 9 positively charged particles (protons) and 10 neutrally charged particles (neutrons) in the center of the atom in a clump called the nucleus. Those 9 negatively charged particles (electrons) are moving around outside of the nucleus.
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To calculate the number of neutral charges, subtract the positive charges from the mass (19 - 9), and you get the number of neutral charges (10).


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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

Molar mass of melatonin (C_{13}H_{16}N_2O_2) = 232.28 g/mol

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

Thus the moles of melatonin in 0.01 g are 0.000043

4 0
2 years ago
Show with dot and cross diagram of the formation of ions in the reaction of Fluorine with sodium ions.
Kipish [7]

Answer:

Electron dot diagram is attached below

Explanation:

Sodium is alkali metal and present in group one. It has one valence electron. All alkali metal form salt when react with halogens.

Sodium loses its one electron to get stable.  While all halogens have seven valence electrons they need only one electron to get stable electronic configuration.

When alkali metals such as sodium react with halogen fluorine it loses its one valence electron which is accepted by fluorine and ionic bond is formed. The compound formed is called sodium fluoride.

Na + F   →   NaF

In cross and dot diagram electrons of one atom are shown as dots while other atom shown as cross to distinguish.

Electron dot diagram is attached below.

Download pdf
3 0
3 years ago
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