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Blizzard [7]
4 years ago
5

Question 7 (4 points)

Chemistry
1 answer:
NNADVOKAT [17]4 years ago
3 0

Answer:

A

Explanation:

A is the answer

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Tincture of iodine has antiseptic properties. This solution is made by dissolving.
ser-zykov [4K]

Tincture of iodine has antiseptic properties and is made by dissolving iodine crystals in alcohol.

<h3>What are antiseptics?</h3>

Antiseptics are substance which prevent or stops the growth of microorganisms.

Microorganisms have been known to cause diseases, therefore the application of antiseptics are useful to prevent diseases.

An example of an antiseptic is tincture of iodine.

Tincture of iodine is prepared by dissolving iodine crystals in alcohol.

In conclusion, antiseptics are useful in the prevention of diseases by microorganism. An example of an antiseptic is tincture of iodine.

Learn more about tincture of iodine at: brainly.com/question/3209701

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7 0
2 years ago
Question 2 the osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the ga
Nutka1998 [239]
<span>1) osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the gas constant r.

Call: P = osmotic pressure; C = molarity; T = absolute temperature

=> P = C * T * r

2) </span><span>write an equation that will let you calculate the molarity c of this solution. your equation should contain only symbols. be sure you define each symbol other than r. </span><span>

</span>=> C = P / (rT)

Answer: C = P / (rT)
6 0
4 years ago
Nitrobenzene contains 5 hydrogen atoms, 6 carbon atoms, 2 oxygen atoms, and 1 nitrogen atom. what is the chemical formula for ni
ollegr [7]

C₆H₅NO₂

<h3>Further explanation</h3>

Nitrobenzene contains:

  • 5 hydrogen atoms,
  • 6 carbon atoms,
  • 2 oxygen atoms, and
  • 1 nitrogen atom.

The chemical formula for nitrobenzene is C₆H₅NO₂.

Nitrobenzene is one of benzene derivatives, precisely including the type of monosubstituted benzenes.

The molecular structure of phenyl  \boxed{ \ C_6H_5- \ } is formed by removing one H atom from the benzene \boxed{ \ C_6H_6 \ } molecule. A substituent is bound to the C atom which loses the H atom so it is called monosubstituted benzene.

In the naming of monosubstituted benzenes, benzene is the parent name and the substituent is indicated by a prefix.

  • nitro is the substituent
  • benzene is the parent name

When benzene is reacted with a mixture of concentrated nitric acid and concentrated sulfuric acid, it yields nitrobenzene.

\boxed{ \ C_6H_6 + HNO_2 \ (with \ H_2SO_4 \ in \ 30^0C-40^0C) \rightarrow C_6H_5NO_2 + H_2O}

- - - - - - -

<u>Notes:</u>

  • Benzene and compounds having similar chemical properties to benzene are called aromatic compounds.
  • Benzene is a colorless, poisonous liquid with a specific odor. it dissolves in organic solvents in organic solvents such as alcohol, ether, and acetic acid. Benzene is also good for non-polar substances.
  • Nitrobenzene is used in the manufacture of aniline and other organic chemicals. Nitrobenzene is a pale yellow, oily, and highly toxic liquid with the odor of bitter almonds.
<h3>Learn more</h3>
  1. Calculating the pH value of weak base brainly.com/question/9040743
  2. About the solution as a homogeneous mixture  brainly.com/question/637791
  3. About the mass and density of substances  brainly.com/question/4053884

Keywords: nitrobenzene, contains, 5 hydrogen atoms, 6 carbon, 2 oxygen, and 1 nitrogen. the chemical formula, benzene, monosaturated, phenyl, aromatic compounds

7 0
3 years ago
Read 2 more answers
What information does the second quantum number of an electron give?
grandymaker [24]

Quantum numbers are the conserved quantities in the system that expresses the position of the electron. The second quantum number describes the electron subshells.

<h3>What are quantum numbers?</h3>

Quantum numbers are the energy and the position defining values of the electron in the atomic structure. There are four basic quantum numbers, principal, magnetic, azimuthal, and spin quantum.

The second quantum number (I) is the angular quantum number that describes the magnitude of the subshells (s,p, d, and f) or the type of the subshells. It is also known as the Azimuthal quantum number.

Therefore, the second quantum number shows the electronic subshells.

Learn more about quantum numbers here:

brainly.com/question/4889088

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3 0
2 years ago
What is the main function of the immune system?
Harman [31]

Answer:

To defend against pathogens

Explanation:

6 0
3 years ago
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