What is the solubility of KCIO3 at 70C In 200g of water ?

An atom which an electron moves from the first to the third shell atom absorbs more energy.

An atoms may occupy different energy states . The energy states are discrete , that means they occur at specific values only. Therefore an atom can only move to a new energy level if it absorbs or emits an amount of energy that exactly corresponds to the difference between two energy levels.

The lowest possible energy levels that the atom can occupy is called ground state.The energy levels which is higher to the ground state is called excited state.

The more energy absorb when electron move from first to third because in this second energy level have to pass to reach at third energy level.

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In molecular compounds, atoms will "share" electrons instead of gaining or losing them.

Atoms share electrons with other atoms to form covalent bonds in molecular compounds like covalent compounds. Both atoms are able to create a more stable electron configuration thanks to the contribution of electrons from each atom to the shared connection. Without a full transfer of electrons, as in the case of ionic compounds, this sharing of electrons makes it possible to build molecules.

In contrast, atoms with differing electronegativities transfer electrons to create ions in ionic compounds. An ionic lattice structure is created as a result of the electrostatic interaction between the positive and negative ions.

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Answer:

An organelle is a structure within a cell which has specific jobs to peform in the cell (it functions like an organ for our body, except it is within the cell itself!)

Explanation:

The organelles in our cells do a lot for us, and they are extremely important for our survival! The organelle ribosome helps assemble protiens, and another organelle called the mitochondria produces chemical energy called ATP (adenosin triphosphate). Perhaps the most important organelle is our nuclei, which store all of our DNA and genetic information! (Note- I'm not listing all of our organelles and their functions here, but you can find a lot more!)

The statement “the yeast engages in photosynthesis, which produces oxygen gas” is incorrect. Yeast cells do not engage in photosynthesis to produce oxygen gas.

Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose (a simple sugar), which serves as food for the plant.

Oxygen is also produced during photosynthesis.Yeast:Yeast is a unicellular fungus that converts sugar into carbon dioxide and alcohol. Yeast cells respire aerobically in the presence of oxygen and anaerobically in the absence of oxygen.

However, yeast cells do not perform photosynthesis. They do not have chloroplasts or pigments that are required for photosynthesis. Therefore, yeast cells cannot produce oxygen gas.Bio quizlet:Quizlet is an online learning platform that allows users to create and share flashcards, study guides, and quizzes.

It is a great resource for studying biology and other subjects. Students can create their own study materials or use existing ones created by other users. Quizlet provides an engaging and interactive way to learn and retain information.

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The enzymes, that break down the insects are most likely what kind of biological catalyst.

Biological catalysts are called enzymes. There is, for instance, an enzyme in our saliva which converts starch to a simple sugar, which is used by the cell to produce energy, and another enzyme which degrades the excess lactic acid produced when we overexert ourselves. Enzymes are proteins that catalyze a chemical reaction in our body. They function as a catalyst that speeds up the reaction by lowering the activation energy.

The enzyme accelerates a chemical reaction without changing its equilibrium, so it is called as a biocatalyst.

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Answer:

7.8286e+23

Explanation:

Use Avogadro's number

To shift the potential of the lead-zinc cell upward, toward 0.70 V, the following actions would give the desired result:

Add some concentrated Pb(C2H3O2)2 solution to the Pb2+/Pb couple

Adding some concentrated Zn(C2H3O2)2 solution to the Zn2+/Zn couple

Any action that makes [Zn2+] larger than [Pb2+]

A lead-zinc cell is a galvanic cell consisting of lead and zinc electrodes immersed in a suitable electrolyte. The potential of the lead-zinc cell is the difference in electrode potential between the lead and zinc electrodes, as determined by their concentration gradient.

Therefore, to shift the potential of the lead-zinc cell upward, toward 0.70 V, one should add some concentrated Pb(C2H3O2)2 solution to the Pb2+/Pb couple, add some concentrated Zn(C2H3O2)2 solution to the Zn2+/Zn couple, and any action that makes [Zn2+] larger than [Pb2+].

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Each element's mass at the start of an interaction will be the same as its mass at the conclusion of the reaction.

Individual water molecules may behave as catalysts or reactants in the process. By interactions between solute and solvent and solvent rearrangement, water can influence variations in the free activation power.

In a chemical reaction, the active sites (what you start with) are transformed into byproducts (what you end with). An arrow separates the reaction mixture, which are displayed on the left side about an equation, from the product, which are displayed on the right.

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Answer:

ZnBr2

Explanation:

KNO3 + LiOH -------> no reaction

This is because KNO3 and LiOH completely ionize.in water and form neutral solutions.Since both are neutral no reaction occurs

NH4Cl + LiOH -----> NH3 (aq) + H2O (l) + LiCl(aq)

None of the above products are precipitates

Ca(C2H3O2)2 + 2LiOH -----> Ca(OH)2 (aq) + 2LiC2H3O2 (aq)

ZnBr2 + 2LiOH -----> Zn(OH)2 (s) + LiBr2 ( aq)

Zn(OH)2 thus formed is a white precipitate

However when excess LiOH is added Zn(OH)2 precipitate will dissolve to give a clear solution of Li2ZnO2 .

You can remember this by the fact that Na,K,Rb,Cs,Ca,Sr,Ba hydroxides are soluble in water and all other hydroxide are precipitated in water

Zn(OH)2 (s) + 2 LiOH ------> Li2ZnO2(aq) + 2 H2O ( l)

The only compound that will form a precipitate with LiOH would be ZnBr2

These are double displacement reactions in which precipitates are produced. Precipitates are insoluble solids formed from the combination of ions in aqueous solutions.

In this case, a reaction between LiOH and ZnBr2 would be as follows;

2LiOH + ZnBr2 ----------> 2LiBr + Zn(OH)2 (s)

Zn(OH)2 is an insoluble salt and will precipitate out in the solution.

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The mass of water produced when 7.92 g of butane reacts with excess oxygen is approximately 24.6 grams.

The balanced chemical equation for the combustion of butane with oxygen is:

C4H10 + 13O2 -> 4CO2 + 10H2O

we can calculate the number of moles and then use the stoichiometry of the reaction to find the mass of water produced.

Firstly convert the mass of butane to moles:

moles = mass / molar mass

moles = 7.92 g / 58.12 g/mol = 0.1364 moles

Next, we'll use the stoichiometry of the reaction to find the no. of moles of water produced:

moles of water = 0.1364 moles * 10 moles of water / 1 mole of butane

moles of water = 1.364 moles

Finally, we'll convert the number of moles of water to mass:

mass = moles * molar mass

mass = 1.364 moles * 18.015 g/mol = 24.6 g

So, the mass of water produced when 7.92 g of butane reacts with excess oxygen is approximately 24.6 grams.

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The correct answer is option 4: 1.66 x 10^(-5) M.Concentration of hydrogen ions in a solution with pH = 4. 282 is  4: 1.66 x 10^(-5) M.

The concentration of hydrogen ions in a solution with pH = 4.282 can be calculated using the formula:

[H+] = 10^(-pH)

where [H+] represents the concentration of hydrogen ions.

Plugging in the given pH value:

[H+] = 10^(-4.282)

Using a calculator, we find:

[H+] ≈ 1.66 x 10^(-5) M

Therefore, the correct answer is option 4: 1.66 x 10^(-5) M.

Concentration of hydrogen ions in a solution with pH = 4. 282 is  4: 1.66 x 10^(-5) M.

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Answer:

this is not the full question

\(\\ \rm\Rrightarrow pH=-log[H^+]\)

\(\\ \rm\Rrightarrow pH=-log[2.5\times 10^{-6}]\)

\(\\ \rm\Rrightarrow pH=-log2.5-log10^{-6}\)

\(\\ \rm\Rrightarrow pH=-0.398+6\)

\(\\ \rm\Rrightarrow pH=5.602\)

There are approximately 0.000486 moles of hydrogen present in the sample.

To find the number of moles of hydrogen present in the sample, you need to use the ideal gas law equation, which is PV = nRT where P is the pressure of the gas (in atm), V is the volume of the gas (in L), n is the number of moles of gas, R is the ideal gas constant, and T is the temperature of the gas (in K). First, you need to convert the pressure from torr to atm. You can do this by dividing the pressure in torr by 760, since 1 atm is equal to 760 torr. In this case, the pressure in atm would be: P = 764.5 torr / 760 = 1.0059 atm Next, you need to convert the volume from ml to L. You can do this by dividing the volume in ml by 1000, since 1 L is equal to 1000 ml. In this case, the volume in L would be: V = 30.42 ml / 1000 = 0.03042 L Finally, you need to convert the temperature from degrees Celsius to Kelvin. You can do this by adding 273.15 to the temperature in Celsius. In this case, the temperature in K would be:T = 25.58 degrees Celsius + 273.15 = 298.73 K Now that you have all the necessary values, you can plug them into the ideal gas law equation to solve for the number of moles of hydrogen: n = (PV) / (RT) = (1.0059 atm * 0.03042 L) / (8.31 J/mol*K * 298.73 K) = 4.86 x 10^-4 mol Therefore, there are approximately 0.000486 moles of hydrogen present in the sample

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Answer:

Option B. 4 moles of the gaseous product

Explanation:

Data obtained from the question include:

Initial volume (V1) = V

Initial number of mole (n1) = 2 moles

Final volume (V2) = 2V

Final number of mole (n2) =..?

Applying the Avogadro's law equation, we can obtain the number of mole of the gaseous product as follow:

V1/n1 = V2/n2

V/2 = 2V/n2

Cross multiply

V x n2 = 2 x 2V

Divide both side by V

n2 = (2 x 2V)/V

n2 = 2 x 2

n2 = 4 moles

Therefore, 4 moles of the gaseous product were produced.

You with writing ionic compound formulas. An ionic compound consists of a positive ion (cation) and a negative ion (anion) bonded together through electrostatic forces. To write the formula of an ionic compound, you need to balance the charges of the cation and anion to ensure the compound is neutral.

In your example, you have a sodium ion (Na+) and a fluoride ion (F-). The sodium ion has a positive charge of +1, while the fluoride ion has a negative charge of -1. To write the formula for the ionic compound formed by these two ions, you simply combine them in a way that balances their charges. Since the charges are already equal and opposite, you just need to put them together:
Na+ & F- → NaF
The resulting ionic compound is sodium fluoride (NaF). To write formulas for other ionic compounds, follow the same process:
1. Identify the cation and anion involved.
2. Determine the charges of each ion.
3. Balance the charges by adjusting the number of ions as needed.
4. Write the formula, placing the cation first followed by the anion.
Remember to always ensure that the charges are balanced, and the resulting compound is neutral. This method will allow you to write ionic compound formulas effectively.

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Answer:

D

Explanation:

The first ionization energy is the minimum energy required to remove the most loosely bound electron from an atom.

Good luck!

The process of chemicals released from human activity interacting with the atmosphere to form acid rain occurs primarily in the troposphere, the lowest layer of the atmosphere.

Chemicals released into the air from human activities, such as sulfur dioxide (SO2), carbon dioxide (CO2), and nitrous oxide (N2O), undergo various reactions in the atmosphere. These chemicals primarily interact with atmospheric components in the troposphere, the lowest layer of the atmosphere.

When released, sulfur dioxide (SO2) reacts with other atmospheric gases, such as oxygen and water vapor, to form sulfuric acid (H2SO4).

Carbon dioxide (CO2) and nitrous oxide (N2O) do not directly form acid rain but contribute to the overall acidity of rain through their role in the greenhouse effect, which leads to changes in rainfall patterns and alters the chemical balance in the atmosphere.

Ultimately, these chemical reactions and interactions take place in the troposphere, where weather processes occur and the majority of Earth's human activities and pollution emissions take place.

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1.432 x 10^6 g of Fluoride contains 2.90 x 10^25 atoms.

Every element is made up of atoms, and its chemical and physical properties are determined by the number and arrangement of these atoms. The mass of an atom is usually measured in atomic mass units (amu). One atomic mass unit is equal to 1.66 x 10^-24 grams.

In order to determine the number of atoms in a given mass, we must first convert the mass to atomic mass units. We can then use Avogadro's number, which is 6.022 x 10^23 particles per mole, to calculate the number of atoms.

In this case, 1.432 x 10^6 grams of Fluoride would convert to 8.668 x 10^23 atomic mass units. Using Avogadro's number, we can calculate that this mass of Fluoride contains 2.90 x 10^25 atoms.

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Each molecule of sucrose (C₁₂H₂₂O₁₁) dissociates into one molecule of solute when it dissolves in water.

When sucrose (C₁₂H₂₂O₁₁) dissolves in water, it dissociates into its constituent atoms and ions. However, the question is asking about the number of solute molecules resulting from each molecule of sucrose. Since sucrose is a molecular compound and does not ionize in water, it does not dissociate into ions. Therefore, each molecule of sucrose dissolves as a single solute molecule.

To calculate the number of solute molecules formed, we need to first convert the given mass of sucrose into the number of sucrose molecules using Avogadro's number (6.022 x 10²³ molecules/mol):

Number of sucrose molecules = (28 g) / (342.3 g/mol) x (6.022 x 10²³ molecules/mol) = 1.49 x 10²³ molecules

Therefore, when 28 g of sucrose dissolves in 100 mL of water, it forms 1.49 x 10²³ solute molecules. Each molecule of sucrose results in one solute molecule.

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The carbonyl peak wavenumber shifts to the left by 30 in a conjugated system compared to a non-conjugated one.

In an IR spectroscopy, the carbonyl peak is characterized by a strong absorption band between 1710-1730 cm-1. The carbonyl peak is due to the stretching of the C=O bond. In non-conjugated systems, the carbonyl peak has a wavenumber of 1710-1730 cm-1, but in conjugated systems, the peak shifts to the left by 30 cm-1 to a wavenumber of 1680-1700 cm-1. The reason for this shift is that in conjugated systems, the carbonyl group is delocalized, meaning that the electrons in the carbonyl double bond are spread out over a larger area. This delocalization reduces the strength of the C=O bond and causes the peak to shift to the left. This shift allows to distinguish between a non-conjugated and conjugated carbonyl compound.

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Answer:

(+20) + (-18) = +2

Explanation:

Answer:

A geologist would observe how the material that the sculpture is made out of reacts to the acid.

Answer:

A.outer-shell electrons of one atom are transferred to the inner electron shells of another atom.

Explanation:

In covalent chemical bond, outer shell share pair of electrons to fill both atoms outer shell. Covalent bond can be polar and non-polar. Hydrogen and carbon bonding is example of non-polar bonds; while hydrogen bonding with chlorine is polar covalent bond example

Answer:

266 liters Carbon iv oxide will be formed

Explanation:

The first thing we need to do here is to calculate the number of moles of oxygen reacted.

This can be calculated using the ideal gas equation;

Mathematically;

PV = nRT

From the question;

P = pressure = 10.5 atm

V = volume = 400 liters

n = number of moles = ?

T = temperature = 125 + 273 = 398K

R = molar gas constant = 0.0821 L•atm•K^-1•mol^-1

Substituting these values, we have ;

n = PV/RT

n = (10.25 * 400)/(398 * 0.0821) = 125 moles

From the question;

15 moles oxygen gave 10 moles CO2

125 moles oxygen will give x moles CO2

x = (125 * 10)/15 = 83 moles

Now, we want to know the volume of CO2, present in 83 moles using the given reaction conditions.

Mathematically;

PV = nRT

V = nRT/P

= (83 * 0.0821 * 398)/10.25 = 265.65 which is approximately 266 Liters

To answer if a salt is formed between the reaction of a base and an acid, we need to remember that, if we react a strong acid and a strong base, such as HCl and NaOH, two products will be formed: the appropriate salt and water.

In the example above, we can write the reaction as:

HCl + NaOH -> NaCl + H2O

where a strong acid and a strong base react to form a salt (NaCl) and water (H2O).

Thus, we can say that, yes, a salt is formed when an acid and a base react between each other.

The pairs of conditions that need to construct a similar cell that generates the lowest cell potential is [Zn2+]=0.5M and [Fe2+]=1M because Q<1. The correct answer is option A,

In order to construct a similar cell that generates the lowest cell potential, we need to consider the Nernst equation.

Where,

Ecell=E°cell − (0.0592/n) log Q

Where,

E°cell = Standard electrode potential

n = Number of electrons exchanged

Q = Reaction Quotient = [products]/[reactants]

For the given reaction, the cell potential is +0.32 V. This implies that under standard conditions, Q = 1.The answer to the given question is that [Zn2+] = 0.5 M and [Fe2+] = 1 M because Q < 1.

The conditions under which the standard electrode potential of a half-cell is measured are referred to as standard conditions. This usually entails a concentration of 1.00 mol/L for all substances, an atmospheric pressure of 1.00 atm, and a temperature of 25°C.

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Answer: 1/64 grams of however much originally there is

Explanation:

each half life half of the material has decayed so 0.5*0.5*0.5*0.5*0.5*0.5=1/64

The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Answer:

D) two unhybridized p orbitals

Explanation:

In covalent bond, to form a bond, each of the two participating atoms would put down an  unpaired electron to be used in forming a shared pair of electrons between them.

There are two types of covalent bonds:

A sigma bond \(\sigma\)

A pi bond \(\pi\)

A sigma bond is formed when a hybrid orbital (sp,sp² and sp³) overlaps with another hybrid orbital or with s- or p- orbital.

A pi bond is formed when a p-orbital overlaps with another parallel p-orbital laterally. This implies that ,a  π bond could be formed from the overlap of two unhybridized p orbitals.