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aliina [53]
3 years ago
15

If the pressure and moles of a gas are held constant, the volume of a gas increases by the same factor as the temperature.

Chemistry
1 answer:
Lera25 [3.4K]3 years ago
4 0
The answer to this problem is True
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In order for a cell to continue being efficient at exchanging materials, what must it do to maintain its surface-to-volume ratio
aksik [14]

Explanation:

It will have to change its form in order for the cell to focus on developing and retaining a viable, in order to be large and narrow as in the situation of the nerve cells or to build a more 'contoured' surface, that is, to establish microvillus.

4 0
2 years ago
What is the chemical formula and net ionic equations for all three solutions.
timofeeve [1]

Answer:

See answer below

Explanation:

As you are asking for chemical formula and ionic equation, then, I will assume that after the station #4 below, are the solutions you are requiring.

You are also not specifing if you want for example, result of solution 1 + solution 3. If you need that, please post that on another question.

Now for the chemical formula, you need to identify the elements in all 3 solutions, and also the type of compound.

<u>1. Solution 2 Potassium Chloride: </u>

In this case we have Potassium on one side, and Chlorine on the other side, the symbol for those are K and Cl. As Potassium have the +1 oxidation state, cause is the only one that it can have, when it's next to an halide like chlorine or bromine, it will form a binary salt. The halides, usually work with the lowest oxydation state. In the case of Chlorine it will be -1, so, the formula will be:

KCl

And the net ionic equation will be the chemical equation that shows how the charges and atoms are balanced. In this case it would be:

K⁺ + Cl⁻ ------> KCl

<u>2. Solution 1 Copper(II) sulfate: </u>

In this case we have a tertiary salt, The copper's symbol is Cu, and is working with it oxydation state +2. Sulfate is an anion and it's formula is SO₄ and works with oxydation state -2 instead.

The chemical formula and ionic equation will be:  

Copper(II) sulfate: CuSO₄

And the net equation:

Copper sulfate: Cu²⁺ + SO₄²⁻ -------> CuSO₄

<u>3. Solution 3 Sodium hydroxide:</u>

In this case, we have a compound that it's usually used in acid base reactions. This is a strong base or hydroxide, and we have the element of Sodium (Na) with the oxydation state +1, is the only one it can have, and for the other side we have the oxydrile anion OH, and together is working with the oxydation state -1. So the chemical formula will be:

NaOH

And the net ionic equation:

Na⁺ + OH⁻ -------> NaOH

Hope this helps

4 0
3 years ago
Coefficient -<br> Subscript for K-<br> 3) 4K CO<br> Subscript for C<br> Subscript for 0 -
Ulleksa [173]

Explanation:

....... ¿Qué?

6 0
2 years ago
Read 2 more answers
Which of the following are oxidation half-reactions?
Olin [163]
The answer is the third choice because is oxidation half reactions, only the oxidation state of the reducing agent changes; in this third choice, Fe2+ is oxidized and becomes Fe3+. Just keep in mind that half reactions usually include the change in electrons:

Fe2+ -> Fe3+ +e-<span />
8 0
3 years ago
The density of an aqueous solution containing 25.0 percent of ethanol (C2H5OH) by mass is 0.950 g/mL. (a) Calculate the molality
lora16 [44]

Answer:

a. 7.24m

b. 5.15M

c. 53.4mL of the solution would contain this amount of ethanol.

Explanation:

Molality, m, is defined as the moles of solute (ethanol, in this case) per kg of solvent.

Molarity, M, are the moles of solute per kg of solvent

To solve this question we need to find the moles of solute in 100g of solution and the volume using its density as follows:

a. <em>Moles ethanol -Molar mass: 46.07g/mol-:</em>

25g ethanol * (1mol/46.07g) = <em>0.54265 moles ethanol</em>

<em>kg solvent:</em>

100g solution - 25g solute = 75g solvent * (1kg / 1000g) = 0.075kg

<em>Molality:</em>

0.54265 moles ethanol / 0.075kg = 7.24m

b. <em>Liters solution:</em>

100g solution * (1mL / 0.950g) = 105.3mL * (1L / 1000mL) = <em>0.1053L</em>

<em>Molarity:</em>

0.54265 moles ethanol / 0.1053L = 5.15M

c. 0.275 moles ethanol * (1L / 5.15moles Ethanol) = 0.0534L =

53.4mL of the solution would contain this amount of ethanol

6 0
3 years ago
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