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IgorC [24]
2 years ago
14

An acid (such as H2SO4) and a base (such as NaOH) are mixed together during a titration. The equivalence point is reached when _

____.
the pH reaches its maximum value

the number of moles of H+ ions equals the number of moles of OH– ions

the pH reaches its minimum value

the number of moles of acid equals the number of moles of base
Chemistry
2 answers:
dolphi86 [110]2 years ago
6 0
The answer is "<span>the number of moles of H+ ions equals the number of moles of OH– ions "</span>
raketka [301]2 years ago
4 0

Answer:

the number of moles of H+ ions equals the number of moles of OH– ions

Explanation:

The equivalence point, is the point at which the acid has completely reacted with the base.

In other words, the H+ ions from the acid have completed reacted with the OH- ions from the base, and in order to complete the reaction the moles of OH- must be equal to the number of moles of H+ in the inicial solution.

This is different to the moles of acid or base, because in this case we have two moles of H+ per mol of acid (H2SO4)

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A gas mixture contains oxygen, nitrogen, and carbon dioxide. It has a pressure of 250 mmHg. If the pressure of oxygen is 50 mmHg
kondor19780726 [428]

Answer:

P_{CO_2}=25mmHg

Explanation:

Hello there!

In this case, according to the Dalton's law, which explains that the total pressure of a gaseous system equals the sum of the partial pressures of the gases composing, for the gaseous mixture composed by oxygen, nitrogen and carbon dioxide it would be possible to write:

P_{tot}=P_{N_2}+P_{O_2}+P_{CO_2}

Now, given the pressure of the system and those of oxygen and nitrogen, we calculate that of carbon dioxide as shown below:

P_{CO_2}=P_{tot}-P_{N_2}-P_{O_2}\\\\P_{CO_2}=250mmHg-50mmHg-175mmHg\\\\P_{CO_2}=25mmHg

Best regards!

4 0
2 years ago
Classify each amino acid into the following categories. Select the amino acid that fits best in each category. Each amino acid w
mel-nik [20]

Answer:

1. Lysine

2. Aspartic acid

3. Serine

4. Alanine

5. Tryptophan

Explanation:

Amino acids are biomolecules that contain two functional groups and one R side chain. The two functional groups are: carboxyl group and amino group.

The α-amino acids are the amino acids in which the two functional groups and the R side chain are attached to the α-carbon of the amino acid. They are total 22 α-amino acids.

1. A basic amino acid: Lysine is a positively charged, polar basic amino acid with a lysyl side chain.

2. An acidic amino acid: Aspartic acid is a negatively charged, polar acidic amino acid with an acidic carboxymethyl group.

3. A neutral polar amino acid: Serine is a polar and neutral amino acid with a hydroxymethyl group.

4. A non-polar aliphatic amino acid: Alanine is an aliphatic, nonpolar and neutral amino acid with a methyl side chain.

5. An aromatic amino acid: Tryptophan is an aromatic, nonpolar and neutral amino acid with an indole side chain.

3 0
3 years ago
What process forms an image in a mirror? Choices: A. absorbing light B. Reflecting light C. Refracting light D. Transmitting lig
Dafna1 [17]

Answer

Using the law of reflection—the angle of reflection equals the angle of incidence—we can see that the image and object are the same distance from the mirror. This is a virtual image, since it cannot be projected—the rays only appear to originate from a common point behind the mirror.

Explanation:

Hope this helps someone

4 0
2 years ago
An atom with an atomic number of 10 and a mass number of 24 would have ________.
Anastaziya [24]

An atom with an atomic number of 10 and a mass number of 24 would have 14 neutrons.

<h3>What is atomic number and mass number?</h3>

The term atomic number, conventionally denoted by the symbol Z.

Atomic number indicates the number of protons present in the nucleus of an atom, which is also equal to the number of electrons in an uncharged atom.

The mass number of a given atom is defined by the number of protons and neutrons present in the nucleus. In simple,

Protons + Neutrons = Mass Number

To learn more about atoms, refer

https://brainly.in/question/5318

#SPJ4

6 0
1 year ago
In chemical reaction atoms are what?
user100 [1]

Answer:

<h3>In chemical reaction atoms are reactants </h3>
5 0
3 years ago
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