the accepted value for the ka of acetic acid is 1.8 10-5. how well does the accepted value compare with your calculated values? explain. 2. does ka kb

Sulfuric acid can dissociate into hydronium ions (H3O+) and hydrogen sulfate ions (HSO4−).

Sulfuric acid is a very strong acid which ionizes into hydronium ions (H3O+) and hydrogen sulfate ions (HSO4−) while on the other hand, in dilute solutions the hydrogen sulfate ions also dissociate, forming more hydronium ions and sulfate ions (SO42−).

So we can conclude that Sulfuric acid can dissociate into hydronium ions (H3O+) and hydrogen sulfate ions (HSO4−).

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Answer:

The answer is B. they deliver oxygen to the blood.

Explanation:

Well air gets inside you to your lungs by your nose and mouth and once its inside your lungs travels that oxygen to your blood and takes "old" oxygen and releases it back out, all of this happens very quickly.

The lungs, nose, and trachea are organs of the respiratory system, in the body they deliver oxygen to the blood, hence option B is correct.

The network of organs and tissues that aids in breathing is known as the respiratory system. It consists of your blood vessels, lungs, and airways.

Alveolar walls include blood arteries called capillaries. Through the pulmonary artery and pulmonary vein, blood enters and exits the body through capillaries.

Blood absorbs oxygen from the air in the alveoli while it is in the capillaries and releases carbon dioxide via the capillary wall into the capillaries.

Therefore, the function of the respiratory system is to deliver oxygen to the blood.

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the element is in group 2

Answer:

yes

Explanation:

CO2 is soluble because water molecules are attracted to these polar areas. The bond between carbon

Answer: The number of electrons held in sub-level l = 3 can be, 14 electrons.

Explanation:

The number of electrons held in sub-level l = 3 can be, 14 electrons

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from . When l = 2, the value of  will be -2, -1, 0, +1, +2.

Spin Quantum number : It describes the direction of electron spin. This is represented as  The value of this is  for upward spin and  for downward spin.

As we are given that,

(For each sub-shell)

From this we conclude that, there are 7 orbitals and each orbital contains 2 electrons. So, the number of electrons held in sub-level l = 3 are,  electrons.

Hence, the number of electrons held in sub-level l = 3 can be, 14 electrons

Answer:

Also, l=3 is an F orbital which has 14 electrons and 7 orbitals. How many total orbitals are there in sublevel 3? Answer: There are 9 orbitals in 3rd energy level. Explanation: Thus, the third level holds a maximum of 18 electrons: 2 in the s orbital, 6 in the three p orbitals, and 10 in the five d orbitals.

Explanation:

Hope this helps:) Also can I have brainliest?

Answer: The ratio of mass of sulfur atom to mass of oxygen atom in sulfur dioxide is 1: 1.

Explanation:

Law of constant proportion states that In a chemical substance the elements are always present in definite proportions by mass. This law is also known as 'Law of definite proportions '.

Mass of 1 atom of sulphur = 32 g

Mass of 1 atom of oxygen = 16 g

Mass of 2 atoms of oxygen =\(16g\times 2=32g\)

In formation of \(SO_2\) , 1 atom of sulfur combines with 2 atoms of oxygen and thus the mass ratio will be 32: 32= 1:1 .

Thus the ratio of mass of sulfur atom to mass of oxygen atom in sulfur dioxide is 1: 1.

In this model, electrons are found on unique levels and when jumping from one level to another, electrons emit light at a specific wavelength.

The Bohr model is an atomic model describing the properties of atoms and their constituents (electrons).

This model states different atoms have specific levels of energy where electrons can be located.

In conclusion, in this model, electrons are found on unique levels and when jumping from one level to another, electrons emit light at a specific wavelength.

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Answer:

In the Bohr model, electrons can exist only in certain energy levels surrounding the atom. The energy levels in each atom are unique. When electrons jump from a higher energy level to a lower one, they emit light at a wavelength that corresponds to the energy difference between the levels.

Explanation:

Ed22

Answer:

higher data rates are

Explanation:

transmitted

as the bandwidth

is more

more antenna gain is possible

Answer:

It's safe to assume that Naruto surpassed Kakashi during the Pain arc. He was able to defeat Pain and later he was able to use Sage mode as well. His ability to link up with Kurama and his vast chakra reserve make him an incredibly powerful shinobi.

Explanation:

Answer:

See Explanation

Explanation:

The question is incomplete; as the mixtures are not given.

However, I'll give a general explanation on how to go about it and I'll also give an example.

The percentage of a component in a mixture is calculated as:

\(\%C_E = \frac{E}{T} * 100\%\)

Where

E = Amount of element/component

T = Amount of all elements/components

Take for instance:

In \((Ca(OH)_2)\)

The amount of all elements is: (i.e formula mass of \((Ca(OH)_2)\))

\(T = 1 * Ca + 2 * H + 2 * O\)

\(T = 1 * 40 + 2 * 1 + 2 * 16\)

\(T = 74\)

The amount of calcium is: (i.e formula mass of calcium)

\(E = 1 * Ca\)

\(E = 1 * 40\)

\(E = 40\)

So, the percentage component of calcium is:

\(\%C_E = \frac{E}{T} * 100\%\)

\(\%C_E = \frac{40}{74} * 100\%\)

\(\%C_E = \frac{4000}{74}\%\)

\(\%C_E = 54.05\%\)

The amount of hydrogen is:

\(E = 2 * H\)

\(E = 2 * 1\)

\(E = 2\)

So, the percentage component of hydrogen is:

\(\%C_E = \frac{E}{T} * 100\%\)

\(\%C_E = \frac{2}{74} * 100\%\)

\(\%C_E = \frac{200}{74}\%\)

\(\%C_E = 2.70\%\)

Similarly, for oxygen:

The amount of oxygen is:

\(E = 2 * O\)

\(E = 2 * 16\)

\(E = 32\)

So, the percentage component of oxygen is:

\(\%C_E = \frac{E}{T} * 100\%\)

\(\%C_E = \frac{32}{74} * 100\%\)

\(\%C_E = \frac{3200}{74}\%\)

\(\%C_E = 43.24\%\)

Answer:

no

Explanation:

its made of a living organisim which in this case is oats

Answer:

CH2

Explanation:

The empirical formula is the simplest formula of a chemical compound. It shows the ratio in which constituent atoms are combined in the compound.

To obtain the empirical formula, we divide the given mass of each element by the relative atomic mass of that element.

C- 36.0 g/12.0 g         H- 6.0g/1.0g

C- 3                             H-6

Divide through by the lowest ratio;

C-3/3                              H- 6/3

C-1                                  H-2

Hence the empirical formula of the compound is

CH2

Lightbulb 1 has the lowest  percentage of energy lost as waste : 25%

Given

The input, output, and waste energy of Lightbulb

Required

The lowest  percentage of energy lost as waste.

Solution

Lightbulb 1 :

\(\tt \%energy~lost=\dfrac{50}{200}\times 100\%=25\%\)

Lightbulb 2 :

\(\tt \%energy~lost=\dfrac{30}{100}\times 100\%=30\%\)

Lightbulb 3:

\(\tt \%energy~lost=\dfrac{100}{150}\times 100\%=66.7\%\)

Answer: lightbulb 1: 200 joules in, 50 joules wasted, 150 joules out

Explanation:

Answer:

Significant Figures in 200.0

Result 200.0

Sig Figs 4 (200.0)

Decimals 1 (200.0)

Scientific Notation 2.000 × 102

E-Notation 2.000e+2

Answer:

A- a rigid solid

Explanation:

The Earths mantle is mainly made up of rock and rocks are rigid and are solid.

When diluting a strong acid with water, it is recommended to add the acid to the water and not the other way around. The statement is true.

This is because adding water to the acid can cause a rapid and exothermic reaction, leading to splattering and potential injury.

When the acid is added to the water, the heat generated is absorbed by the water, reducing the potential for splattering. Additionally, adding the acid to water allows for better mixing and reduces the risk of creating concentrated acid pockets that can be dangerous.

Overall, it is important to follow safe laboratory practices when working with acids and to consult with a trained professional if you are unsure about the proper procedures.

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Answer:

Explanation:

About 3.5% of the weight of seawater is made up of dissolved salts because of the salinity, or salt concentration, of saltwater, which is 35 parts per thousand.

_________________

Hope this helps!

Have a great day!

Answer:

the Caribbean

Explanation:

(b) false

It is not ok to pour it back in the bottle

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Answer:

The correct answer is Mg

Answer:

Sodium sulfide is the chemical compound with the formula Na 2 S, or more commonly its hydrate Na 2 S·9H 2 O. Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na 2 S and its hydrates emit hydrogen sulfide , which smells like rotten eggs.

I'm not sure if it's right but it's a guess because of the 2Na.

That is sodium carbonate, Na₂CO₃.

Yes, 1-hexene exhibits cis/trans isomerism. 1-hexene is a type of aliphatic olefin, an unsaturated hydrocarbon

Isomerism refers to a phenomenon where two or more compounds have the same molecular formula but a different structure, resulting in different chemical and physical properties . Isomers may be classified into two types based on the arrangement of atoms within the molecule. They are as follows:      

Cis-isomers:  These isomers have the same functional groups on the same side of the molecule. They have lower boiling points and higher melting points compared to trans isomers.The term "cis" is Latin for "on the same side."

Trans-isomers:  These isomers have the same functional groups on opposite sides of the molecule. They have higher boiling points and lower melting points than cis isomers.The term "trans" is Latin for "across."

1-hexene is a type of aliphatic olefin, an unsaturated hydrocarbon. It is a six-carbon alkene that contains a double bond between carbon atoms one and two (1-hexene). The molecular formula of 1-hexene is C₆H₁₂. 1-hexene has two isomers - cis and trans.  Therefore, it displays cis/trans isomerism.

The hydrogen atoms are on the same side of the double bond. The hydrogen atoms are on opposite sides of the double bond.

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To slow down the molecules of the medicine and cause a phase change, the doctor needs to transfer energy out of the medicine until it is a solid.

She would expel energy from the medication until it solidified in order to accomplish this. The kinetic energy of the molecules is reduced by removing energy from the medication, usually by cooling or freezing. A phase transition from a liquid to a solid state is caused by this decrease in molecular mobility.

Compared to the more mobile molecules in the liquid phase, the slower-moving molecules in the solid phase will have less mobility to manoeuvre around one another. With the use of this procedure, the doctor is able to regulate the medication's physical state for a number of uses, including patient administration, storage, and preservation.

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Answer:

Construction

Explanation:

The strength of bonds formed and broken depends on the specific chemical reaction involved. In some reactions, the bonds formed are stronger than the bonds broken, while in other reactions, the opposite is true.

When a chemical reaction is exothermic, meaning that it releases energy, the bonds formed are typically stronger than the bonds broken. This is because energy is released when the bonds are formed, indicating that they are more stable and stronger than the bonds that were broken.

On the other hand, in an endothermic reaction, meaning that it absorbs energy, the bonds broken are usually stronger than the bonds formed. This is because energy is required to break the existing bonds, indicating that they are stronger and more stable than the new bonds that are formed.

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The light yellow color of trans-p-anisalacetophenone can be attributed to the presence of conjugated double bonds in its structure, which absorb light in the blue region of the spectrum and appear yellow. This color is a characteristic feature of this compound and is not necessarily indicative of impurities.

The color of a compound can provide information about its structure and purity, but it is important to consider other factors as well, such as the method of preparation and storage conditions.

In general, if a compound has a consistent color across different batches and its purity has been verified using analytical techniques, then the color is unlikely to be a sign of impurities. However, if the color varies significantly or there are other signs of impurities, then further analysis may be necessary to identify and remove any contaminants.

The light yellow color of trans-p-anisalacetophenone is likely due to the presence of impurities or a byproduct from the synthesis process. While it is possible that the color could be indicative of an impurity, further analysis would be necessary to confirm this.

It is important to note that the color of a compound alone is not enough to determine the purity or identity of a sample.

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Answer:

you would expect 0 radioactive nuclei to be present

Explanation:

got it right on the assignment

INFORMATION:

We have:

- 66 grams of NaCl

- 255 grams of water

If the NaCl is dissolved into the water, we must find the mass percent

STEP BY STEP EXPLANATION:

To find the mass percent we must must use the next formula

In our case,

- the solute is NaCl

- the solution would be the sum of masses from NaCl and water

Then,

- mass of solute = 66 g

- mass of solution = 66 g + 255 g = 321 g

Finally, replacing in the formula,

ANSWER:

The mass percent when 66 grams of NaCl is dissolved in 255 grams of water is 20.60%

The pair of molecules described are enantiomers.

The pair of molecules described are enantiomers.

Enantiomers are stereoisomers that are non-superimposable mirror images of each other. In this case, the two cyclohexane molecules have the same connectivity of atoms (constitutional isomers) but differ in their spatial arrangement due to the presence of chiral centers.

In compound one, the equatorial chlorine on carbon 1 is replaced by an axial chlorine in compound two, and vice versa. The flip in the chair conformation results in the interchange of axial and equatorial positions for the chlorine atoms. This change in spatial arrangement creates a pair of enantiomers.

Enantiomers have identical physical and chemical properties in an achiral environment but differ in their interaction with chiral environments, such as with other chiral molecules or chiral catalysts.

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Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

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