A gram sample of a KCl and KClO3 mixture was found to contain 0.00875 mol of KClO3. What is the percent by mass of KClO3 in the original mixture?

Answer:

n = 3, l = 2, ml =-2

Explanation:

Quantum numbers are a set of values which can be used to describe the energy and position of an electron in space.

There are four sets of quantum numbers;

1) principal quantum number

2) orbital quantum number

3) spin quantum number

4) magnetic quantum number.

The values of orbital quantum number include; -l to +l;

The set of quantum numbers without error is ; n = 3, l = 2, ml =-2

The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1, depending on which rate was used to calculate it.

The rate of the reaction is given by the equation:

Rate = -k[A]

where k is the rate constant and [A] is the concentration of the reactant.

Rate at t=140 s:

Rate = (8.00×10−2 M - 0 M) / (140 s - 0 s)

= 5.71×10−4 M/s

Rate at t=400 s:

Rate = (4.00×10−2 M - 0 M) / (400 s - 0 s)

= 1.00×10−4 M/s

Since this is a zero-order reaction, the rate of the reaction is constant, and we can use either rate to calculate the rate constant:

k = Rate / [A]

Using the rate at t=140 s:

k = 5.71×10−4 M/s / 8.00×10−2 M = 7.14×10−3 s−1

Using the rate at t=400 s:

k = 1.00×10−4 M/s / 4.00×10−2 M

= 2.50×10−3 s−1

The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1.

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The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element.

Answer:

The three primary colors used when mixing dyes or paints are red, yellow, and blue. Other colors are often a mixture of these three colors. Try running a chromatography test again with non-primary-color markers, like purple, brown, and orange.

Explanation:

Answer:

The answer is the skin of the apple

The phrase which best describes electronegativity is the relative strength with which an element attracts electrons in a chemical bond and is denoted as option A.

This is referred to as the chemical property which is possessed by an element that involves its tendency to attract electrons especially during chemical bond formation.

Electronegativity increases from bottom to top in groups, and increases from left to right across periods in the periodic table and are influenced by factors such as number of valence electrons etc.

This is usually done so that they can achieve a stable octet configuration which results in the bonds being formed and the new substance being produced thereby making it important in a chemical reaction.

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The options are:

Answer:

The salt bridge serves to complete the electrical circuit in the galvanic cell. It is pertinent that the salt bridge ions are in high concentrations as this allows electron mobility and keeps each half cell electronically neutral. The diluted salt bridge wuld cause a buildup of positive charge in the anode and negative charge in the cathode and the electrode half reactions which either reduce or oxidise species would halt. Causing the cell to stop producing electronic energy, impedeing the proper functioning of the galvanic cell.

\(\huge\boxed{OptionB}\)

The superior vena cava (SVC) is the superior of the two venae cavae, It is located above inferior vena cava and it returns the deoxygenated blood from the systemic circulation to the right atrium of the heart.

The aorta is the main artery that carries blood away from your heart to the rest of your body.

The Left Atrium is one of the two atriums, it receives the oxygenated blood from the lungs via Pulmonary vein.

The Left Ventricle is one of the two ventricles, it receives the oxygenated blood by the Left atrium through the mitral valves. From the ventricle oxygenated blood is provided to the whole body.

Pulmonary Artery is one of the two pulmonary vessels which connect the blood heart and lung. Pulmonary Artery takes the deoxygenated blood from the Right ventricle to the Lungs from the oxygenation.

Answer:

The 3rd one " C " because it surrounds the nucleus it's not known the inside

An electron is found in the space surrounding the nucleus.

An electron is a sub-atomic particle which is found in the extra-nuclear part of an atom. They are found revolving int the shells which surround the nucleus.It carries a negative charge of  minus 1 .

They are the elementary particles as they do not  have known components or structure. It has a mass which is approximately equal 1/1836 th that of proton.No two electrons can occupy the same  quantum state according to the Pauli exclusion principle.

As all elementary particles, it too does possess both particle and wave characteristics. They can collide with each other and cause diffraction . Wave properties of electrons are easier to observe  with aid of experiments, because of lower mass and longer de Broglie wavelength.

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The molecule that will engage in the strongest dispersion forces is CL.

Dispersion forces, also known as London forces, are the weakest type of intermolecular forces and exist between all types of molecules.

They arise from the momentary fluctuations of electron density in a molecule, which creates temporary dipoles. These temporary dipoles then interact with each other and result in attractive forces between the molecules.

Dispersion forces are important in determining the physical properties of substances, such as boiling and melting points, and are responsible for the cohesive properties of nonpolar liquids and solids.

The strength of dispersion forces depends on the size and polarizability of the molecule.

The larger and more polarizable the molecule, the stronger the dispersion forces will be. Among the molecules listed, CL has the largest size and is the most polarizable, leading to the strongest dispersion forces.

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Answer:

B. Producers and decomposers

Explanation:

Producers aka plants convert raw energy into chemical energy.

Decomposers are responsible for decomposing dead organisms.

Answer:

the answer is b

Explanation:

Because it provides for the restoration of the life cycle

The required formula of hydrate is MgSO₃.6H₂O.

The number of moles of water per mole of anhydrous solid (x) will be computed by dividing the number of moles of water by the number of moles of anhydrous solid (x) to find the hydrate's formula.

Moles will be calculated as:
n = W/M, where

Moles of MgSO₃ = 0.737g / 104.3g/mol = 0.007mol

Moles of H₂O = 0.763g / 18g/mol = 0.04 mol

Number of H₂O molecule = 0.04/0.007 = 5.7 = 6

So formula of hydrate is MgSO₃.6H₂O.

Hence required formula of hydrate compound is MgSO₃.6H₂O.

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The energy of the photon of light can be obtained as 6.27 * 10^-20 J.

We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.

We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;

E = hf

h = Plank's constant

f = Frequency

Then;

E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz

= 6.27 * 10^-20 J

Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.

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Answer: The final temperature of the water will be \(34.0^0C\)

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

\(Q=m\times c\times \Delta T\)

Q = Heat absorbed=\(6832\) Joules

m= mass of water = \(5.9mol\times 18g/mol=106.2g\)

c = specific heat capacity = \(4.184J/g^0C\)

Initial temperature of the water = \(T_i\) = \(18.6^0C\)

Final temperature of the water = \(T_f\)  = ?

Putting in the values, we get:

\(6832=106.2\times 4.184\times (T_f-18.6)\)

\(T_f=34.0^0C\)

The final temperature of the water will be \(34.0^0C\)

Answer:

Explanation:

aluminum

Answer: The aluminum ion

Explanation:

Answer: The empirical formula of the compound is \(KMnO_4\)

Explanation:

The empirical formula is the chemical formula of the simplest ratio of the number of atoms of each element present in a compound.

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\) ......(1)

Let the mass of the compound be 100 g

Given values:

% of K = 24.7%

% of Mn = 34.76%

% of O = 40.50%

Mass of K = 24.7 g

Mass of Mn = 34.76 g

Mass of O = 40.50 g

To calculate the empirical formula of a compound, few steps need to be followed:

We know:

Molar mass of K = 39.10 g/mol

Molar mass of Mn = 54.94 g/mol

Molar mass of O = 16 g/mol

Putting values in equation 1, we get:

\(\text{Moles of K}=\frac{24.7g}{39.10g/mol}=0.632 mol\)

\(\text{Moles of Mn}=\frac{34.76g}{54.94g/mol}=0.633 mol\)

\(\text{Moles of O}=\frac{40.50g}{16g/mol}=2.53 mol\)

\(\text{Mole fraction of K}=\frac{0.632}{0.632}=1\)

\(\text{Mole fraction of Mn}=\frac{0.633}{0.632}=1\)

\(\text{Mole fraction of O}=\frac{2.53}{0.632}=4\)

The empirical formula of the compound becomes \(K_1Mn_1O_4=KMnO_4\)

Hence, the empirical formula of the compound is \(KMnO_4\)

The empirical formula of the compound is KMnO₄

Divide by their molar mass

K = 24.74 / 39 = 0.634

Mn = 34.76 / 55 = 0.632

O = 40.50 / 16 = 2.531

Divide by the smallest

K = 0.634 / 0.632 = 1

Mn = 0.632 / 0.632 = 1

O = 2.531 / 0.632 = 4

Therefore, the empirical formula of the compound is KMnO₄

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The organic product formed in the reaction shown in the image would be bromoethane.

Alkanes, such as ethane undergoes a substitution reaction with halogens such as bromine to produce haloethanes.

For example, the equation of the reaction between ethane and bromine water is as below:

\(C_2H_6 + Br_2 --- > C_2H_5Br + HBr\)

The products formed are bromoethane and hydrobromic acid.

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Answer:

Convergent boundaries

Explanation:

Explanation:

Galileo found Venus went through the entire phase cycle, proving that she revolved completely around the Sun, as predicted by Copernicus in his heliocentric model. ... The phases of Venus could not be explained by Ptolemy's Geocentric Model. Galileo knew that the Roman Catholic Church was incorrect.

Explanation:

1. Pb(CO3)2

Element Number Mass Percet Composition

Oxygen 6 16.00 29.34%

Carbon 2 12.01 7.34%

Lead 1 207.21 63.32%

2. Ga(OH)3

Element Number Mass Percet Composition

Hydrogen 3 1.0079 2.50%

Oxygen. 3 16.00 39.75%

Gallium 1 69.72 57.74%

3. P4O10

Element Number Mass Percet Composition

Oxygen. 10 16.00. 56.36%

Phosphorus. 4 30.97 43.64%

4. Ca3P2

Element Number Mass Percet Composition

Phosphorus 2 30.97 34.00%

Calcium. 3 40.08 66.00%

5. Ti(NO3)3

Element Number Mass Percet Composition

Oxygen. 9 16.00 61.56%

Titanium. 1 47.87 20.47%

Nitrogen. 3 14.01 17.97%

It is to be noted by Isaac Newton that until the nineteenth century, scientific data did not decisively exclude the concept of chemical gold production.

While alchemy has not survived current scientific examination, it did play a part in the development of modern scientific methodologies. Although gold cannot be generated from other materials, it may be taken from a number of materials.

Because Alchemy is not true science but Proto-science, Newton should therefore toss aside his alchemy fixation for true chemistry.

Alchemy is a historical branch of natural philosophy, a philosophical and proto-scientific tradition practiced in China, India, the Muslim world, and Europe.

Alchemy consists of seven fundamental actions. Calcination, dissolution, separation, conjunction, fermentation, distillation, and coagulation are all examples of chemical reactions.

Each operation is a chemical, physical, and physiological process. When the seven operations are used psychologically, they usually result in self-improvement.

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Answer:=1

Explanation:H = 1, O = 16, C = 12, N = 14 and 14--13 = 1 and your answer is 1

Answer:

evaporation, collection, condensation, precipitation

Explanation:

There are four main stages in the water cycle. They are evaporation, condensation, precipitation and collection. ... Condensation: This is when water vapour in the air cools down and turns back into liquid water. Precipitation: This is when water (in the form of rain, snow, hail or sleet) falls from clouds in the sky.

Water from the lake evaporates into the air, forms clouds, and eventually falls back onto the lake as precipitation.

The shore of a large lake provides an ideal location for all three phases of the water cycle to occur. Water from the lake evaporates due to the heat from the sun, forming water vapor in the air. This is the first phase of the water cycle - evaporation. As the moist air moves upwards, it cools, and the water vapor condenses to form clouds. This is the second phase of the water cycle - condensation.

As the clouds continue to accumulate, they release precipitation in the form of rain or snow over the lake and surrounding land. This is the third phase of the water cycle - precipitation. Precipitation either falls directly into the lake or runs off into it from the surrounding land, completing the water cycle. The water cycle is a continuous process, and the cycle repeats itself as the lake continues to lose water due to evaporation and gain water due to precipitation.

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Answer:

Concentration of H3O⁺  [H3O⁺] = 0.864 M

Explanation:

Given that:

The mass concentration of MO = 43 g/L

The volume of MO = 7.9 mL = 7.9 × 10⁻³ L

Recall that

The mass number of MO = Mass concentration of MO × Volume of MO

The mass number of MO = (43 g/L) * (7.9 × 10⁻³ L)

The mass number of MO =  0.3397 g

number of  moles of MO = (mass number of MO) / (molar mass of MO)

number of  moles of MO = (0.3397 g) / (327.33 g/mol)

moles of MO = 0.00104 mol

The total volume = 7.9 mL + 3.13 mL + 5.49 mL + 3.43 mL

The total volume = 19.95 mL = 19.95 × 10⁻³ L

Concentration of MO [MO} =(number of moles of MO) / (total volume)

[MO] = 0.00104 mol  /  19.95 × 10⁻³ L

[MO] = 5.2130 × 10⁻⁸ M

the number of moles of H3O⁺ = molarity of HCl in the solution × the volume of HCl in solution

the number of moles of H3O⁺ = [(2.0 M) * (3.13 mL)] + [(2.0 M) * (5.49 mL)]

the number of moles of H3O⁺ = 17.24 mmol

Concentration of H3O⁺  [H3O⁺] = (the number of moles of H3O⁺) / (total volume)

Concentration of H3O⁺  [H3O⁺] = (17.24 mmol) / (19.95 mL)

Concentration of H3O⁺  [H3O⁺] = 0.864 M

The Concentration of H3O⁺  [H3O⁺] is 0.864 M

But before that following calculations should be needed.

The mass number of MO = Mass concentration of MO × Volume of MO

= (43 g/L) * (7.9 × 10⁻³ L)

=  0.3397 g

Now

number of  moles of MO = (mass number of MO) / (molar mass of MO)

= (0.3397 g) / (327.33 g/mol)

= 0.00104 mol

Now

The total volume = 7.9 mL + 3.13 mL + 5.49 mL + 3.43 mL

= 19.95 mL

= 19.95 × 10⁻³ L

Now

Concentration of MO [MO} =(number of moles of MO) / (total volume)

= 0.00104 mol  /  19.95 × 10⁻³ L

5.2130 × 10⁻⁸ M

Now

the number of moles of H3O⁺ = molarity of HCl in the solution × the volume of HCl in solution

= [(2.0 M) * (3.13 mL)] + [(2.0 M) * (5.49 mL)]

= 17.24 mmol

Now

Concentration of H3O⁺  [H3O⁺] = (the number of moles of H3O⁺) / (total volume)

= (17.24 mmol) / (19.95 mL)

= 0.864 M

Hence, The Concentration of H3O⁺  [H3O⁺] is 0.864 M

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From the calculation, the  maximum wavelength of photon that will eject a ground state electron from a hydrogen atom is 9.5 * 10^-8 m.

We know that the hydrogen atom has electrons that are in it at different energy levels. The lowest energy level of the photon is what we call the ground state of the electron.

The energy of the ground state of the hydrogen atom has an energy of about 13.6eV or 2.08 * 10^-18 J. Then we know that;

E = hc/λ

E = energy of the photon

h = Plank's constant

c = Speed of ight

λ = wavelength

λ = hc/E

λ = 6.6 * 10^-34 * 3 * 10^8/ 2.08 * 10^-18

λ = 9.5 * 10^-8 m

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

J/g°C=H

H×g°C=J

H×g°C/H×g=J/H×g

Answer:

it had wings that flapped similat to birds wings

There is a double bond between the carbon atoms and a lone pair on oxygen.

The term Lewis structure has to do with the structure that shows the arrangement of atoms in a compound. It is normal that the structure would be composed of the symbols of the elements and the bonds that they form as dots or sometimes as a single line to show shared electrons.

Now we can see that the compound C2H2O is a compound that contains a double bond between the carbon atoms. There is a lone pair of electron that resides on the oxygen atom. The structure of this compound is shown in the image attached.

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