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Crank
4 years ago
8

A 3 ml volume of a solution containing an unknown concentration of hcl is added to 7 ml of water. it is then determined that the

concentration of the hcl in the diluted solution is 630 mm. what was the concentration of hcl in the original solution?
Chemistry
1 answer:
Dennis_Churaev [7]4 years ago
6 0
It is b becuase all the other are wrong
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Ammonium carbonate has the chemical formula (NH42CO3How many hydrogen atoms (H) are in ammonium carbonate?
Gre4nikov [31]

Answer:

8

Explanation:

there are two ammonium ions with four hydrogen atoms each.

4*2=8

6 0
3 years ago
Choose all that apply. Solids, liquids, and gases can be distinguished by their:molecular weight shape temperature kinetic energ
vesna_86 [32]
So, we have:
- molecular weight
- shape
- temperature
- kinetic energy
- mass
- density

Let's rule out the different options.
- molecular weight: Say you have a molecule of H2O. H2O can be a solid, liquid, or gas, but its molecular weight never changes throughout (It's still the same molecule, no matter what phase it is in). We can rule this out.

- shape: Let's pretend we have three identical closed containers, and we fill each one halfway with water, blocks of ice cubes, and water vapor. In the container with water, you will see that the water takes the shape of the container, but doesn't fill the entire container up. The ice cubes will stay ice cubes, assuming they don't melt, so they don't take the shape of the container. The vapor will fill up the entire container. Since all three are different, I would say yes, this could be a distinguishable feature.

- temperature: In general, I would say no, because every element/molecule has different boiling points and different vaporization points. So if you have a liquid at 5°C, you could also have a different element in solid form at 5°C. But if you're comparing a single type of molecule, it would have a boiling point and a vaporization point, so you <em>would</em> be able to tell between them.

- kinetic energy: Kinetic energy refers to how much movement there is in respect to each molecule. In solids, the molecules are packed tightly together and can't move very much, so they have lower kinetic energy. In liquids, they are less packed, but still restricted. And in gases, they can fly freely, so they will have much more kinetic energy than liquids or solids. This one's a yes.

- mass: No matter what form, there are still the same amount of molecules, and each molecule has the same mass as before. It won't change.

- density: Since the molecules are more spread out in gases, it will be less dense. Liquids will be more dense, and solids will have the greatest density. So, yes.

Conclusion: shape, kinetic energy, density, (and temperature if it's talking about a single type of molecule)
5 0
3 years ago
the mathematical combination of hybrid atomic orbitals to form standard atomic orbitals where there is a single atomic orbital t
lidiya [134]

The normal atomic orbitals are joined mathematically during the process of hybridization to create new atomic orbitals known as hybrid orbitals. Even if hybrid orbitals are not identical to regular atomic orbitals.

<h3>What are atomic orbitals?</h3>

Atomic theory & quantum mechanics use the mathematical concept of a "atomic orbital" to describe the location and wavelike behavior of an electron within an atom. Each of those orbitals can contain a maximum of electron pairs, each with a unique spin quantum number s.

<h3>How are atomic orbitals calculated?</h3>

Within every of an atom's shells, various orbital combinations can be found. The n=1 shell has just s orbitals; the n=2 shell contains s and p orbitals; the n=3 shell contains s, p, and d orbitals; and the n=4 up shells include all four types of orbitals.

To know more about Atomic orbital visit:

brainly.com/question/28240666

#SPJ4

5 0
2 years ago
Suppose you had an organic molecule such as cystine, and you chemically removed the --nh2 group and replaced it with --cooh. Dra
Serggg [28]

Cystine is dimer of Cystein amino acid formed by oxidation reaction. Its main function is to provide mechanical strength to proteins and allow them to retain their 3-D structures and also serves as a substrate for the cystine-glutamate antiporter.

As shown in figure cystine has two amino groups (highlighted blue) and two carboxylic groups (highlighted green). In its original structure cystine is neutral in nature as it has equal number of basic (NH₂) and acidic (COOH) moieties along with two chiral centers (asymmetric carbons) highlighted with red spots.

When one -NH₂ group is replaced by -COOH group the cystine is converted into an acidic compound with three COOH groups and a NH₂ group. Also, one asymmetric carbon will convert into a symmetrical carbon with a loss of one chiral carbon.

In second step, when another NH₂ is replaced by COOH, the acidic strength of resulting compound will increase along with conversion of last chiral carbon into symmetric carbon.

Therefore, the final structure will be acidic in nature with zero chiral carbons as shown in figure attached below.

6 0
3 years ago
How do mass and type of material affect thermal energy transfer?
Lerok [7]

Answer:

Temperature, mass, and the type of material are factors that affect the thermal energy of an object.

Material with the higher specific heat will have more thermal energy than material with lower specific heat if they both have the same mass and temperature.

3 0
3 years ago
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