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nikitadnepr [17]
3 years ago
12

8. Which part of Dalton's theory did Thomson's findings dispute?

Chemistry
1 answer:
miskamm [114]3 years ago
3 0

Answer:

C

Explanation:

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kondor19780726 [428]

Answer:

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Explanation:

6 0
3 years ago
Carbon-12 is the most common isotope of carbon. It has 6 protons, 6 neutrons, and 6 electrons. Of its 6 electrons, 4 are valence
Mekhanik [1.2K]
A carbon atom can form 4 covalent bonds.
5 0
3 years ago
Read 2 more answers
Draw the structure of the major nitration product from the reaction of nitric acid with 1,3‑dimethylbenzene. Show all formal cha
solong [7]

The 2,4 and 5 positions are accessible for nitration of 1,3‑dimethylbenzene. The final product is shown in the image attached.

<h3>What is nitration?</h3>

Nitration is a type of reaction in which the nitro group (-NO2) is introduced to an aromatic ring. We have to note that in the compound 1,3‑dimethylbenzene, the 2,4 and 5 positions are accessible for nitration as shown.

Hence, the nitration of 1,3‑dimethylbenzene occurs  as shown in the image attached with the compound shown being the major product.

Learn more about nitration: brainly.com/question/5346392

7 0
2 years ago
A 0.21 M solution of a weak acid HA dissociates such that 99.1% of the weak acid remains intact (i.e., remains as HA). To the ne
bixtya [17]

Answer:

pKa = - 1.36012

Explanation:

  • HA ↔ H+ + A-

∴ Ka = [H+] [A-] / [HA]

  • pKa = - Log Ka
  • % dissociates (%α) = ([A-] / [A-] + [HA])×100

∴ %α = 99.1%

∴ <em>C</em> HA = 0.21 M

Mass Balance:

⇒ <em>C </em>HA = [HA] + [A-] = 0.21 M............(1)

Charge balance:

⇒ [H+] = [A-] + [OH-].....[OH-] is neglected, it come from the water

⇒ [H+] = [A-]...............(2)

(2) in (1):

⇒ [HA] = 0.21 - [H+]

replacing in %α:

∴ %α = 99.1% = ([A-]/([A-]+[HA]))×100

⇒ 0.991 = [A-] / [A-] + [HA] = [A-] / 0.21 M

⇒ [A-] = (0.21 M)*(0.991) = 0.20811 M

Replacing in Ka:

⇒ Ka = [H+]² / (0.21 - [H+])

∴ [H+] = [A-] = 0.20811 M

⇒ Ka = (0.20811)² / (0.21 - 0.20811)

⇒ Ka = 22.9152

⇒ pKa = - Log (22.9152)

⇒ pKa = - 1.3601

4 0
3 years ago
Examine the reactants of the incomplete double displacement reaction.
Elza [17]
<h3>Answer:</h3>

The products of the reaction are; AgCl and  NaNO₃

<h3>Explanation:</h3>

In this question we need to know what is a double displacement reaction;

  • A double displacement is a type of replacement reaction in which salts or ionic compounds exchange cations and anions to form new compounds as the products.
  • In this case, the complete double replacement reaction is;

AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

  • The reaction is also a precipitation reaction as it forms a precipitate as one of the products that is silver chloride (AgCl).
  • Therefore, the products of the reaction are; AgCl and  NaNO₃
5 0
3 years ago
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