unbalanced redox reaction

IO3- (aq) + H₂s (aq)→I2 (s) + SO3 2-(aq)

Answer:

hi

Explanation:

hi

The molecular solid that has the lowest boiling point is ; ( A ) One with induced dipole attractions

Induced dipole attraction is a weak dipole force of attraction that occurs whenever a polar molecule induces a dipole in a nonpolar substance thereby distablizing the electron arrangement previously present in the nonpolar substance.

Nonpolar Substances that undergoes induced dipole attraction will have its boiling point lowered due the electron arrangement destabilization it experiences.

Hence we can conclude that the molecular solid that has the lowest boiling point is One with induced dipole attractions.

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Answer: If a sample has 50 atoms of 87Rb and 50 atoms of Sr, it has gone through the equivalent of 77.7 billion years in half-lives.

In order to answer this question, we need to know the half-lives of both 87Rb and Sr. The half-life of 87Rb is 48.8 billion years and the half-life of Sr is 28.9 billion years.

Therefore, the sample has gone through the equivalent of (50/50) x 48.8 billion years, or 48.8 billion years, of 87Rb's half-life.

It has also gone through (50/50) x 28.9 billion years, or 28.9 billion years, of Sr's half-life. In total, the sample has gone through the equivalent of 77.7 billion years in half-lives.

In summary, if a sample has 50 atoms of 87Rb and 50 atoms of Sr, it has gone through the equivalent of 77.7 billion years in half-lives.


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Answer:

C im pretty sure. hope this helps

Answer:

There is only one possible value for the quantity "c"

Explanation:

There is only one possible value for the quantity "c". This is because the a,b,c and d represent number of moles in he balanced equation. And since the number of moles of a particular substance (atom or compound) in a balanced equation must be distinct, it (the substance) can only have one value. For example, consider the equation below

2C₂H₂ + 5O₂ ⇒ 4CO₂ + 2H₂O

It can be seen from the above equation that the individual number of moles are distinct and have just one possible value. And if C₂H₂ is A, O₂ is B, CO₂ is C and H₂O is D, then 4 is "c".

Thus, "c" is the number of moles for the substance "C" with just one possible value.

Among the given weak bases, aniline is the weakest electrolyte in an aqueous solution.What is an electrolyte?An electrolyte is a substance that conducts electricity in an aqueous solution or in a molten state.

In water, they break up into ions and conduct electricity. Electrolytes may be categorized into two types: strong and weak electrolytes. Strong electrolytes dissociate completely into ions in aqueous solution, whereas weak electrolytes only partially dissociate into ions and exist in equilibrium with undissociated molecules. In the given weak bases, aniline is the weakest electrolyte.

Here's how to solve the problem: Aniline has a Kp of 4.0 × 10-10, which is the smallest value of Kp among all the given weak bases. Therefore, aniline is the weakest electrolyte in an aqueous solution.

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Answer:

Step 1) weathering of pre-existing rocks

Step 2) transport of the weathering products

Step 3) deposition of the material

Step 4) compaction of the sediments

Step 5) cementation of the sediment to form a rock.

Explanation: ^^^

The answer is D.

F P Al Ca K Cs

Aluminum is solid at room temperature and will, therefore, have a melting point that is above room temperature.

The room temperature is about 25 degrees Celsius.

Argon and oxygen are gases at room temperature.

Mercury is a liquid at room temperature.

Aluminum, on the other hand, is solid at room temperature. Hence, its melting point is definitely somewhere above room temperature.

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Answer:

The answer copper carbonate

The most abundant energy capturing molecule produced by the citric acid cycle is NADH, which carries high-energy electrons to the electron transport chain for ATP production.

In the citric acid cycle, also known as the Krebs cycle or TCA cycle, acetyl-CoA enters the cycle and is oxidized to produce ATP, NADH, and FADH2. NADH is the most abundant energy-capturing molecule produced in the cycle, as each turn of the cycle produces three molecules of NADH compared to only one molecule of ATP and FADH2. NADH carries high-energy electrons to the electron transport chain, where they are used to produce ATP through oxidative phosphorylation. This process generates the majority of the ATP produced during cellular respiration.

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The given electron configuration belongs to the element fluorine (F).

If an atom of fluorine approaches an atom with one valence electron (such as an alkali metal atom), a bond can form. Fluorine has seven valence electrons, and it requires one more electron to complete its octet (i.e., eight valence electrons) and achieve a stable electron configuration.

Therefore, fluorine will tend to gain one electron from the atom with one valence electron, forming a stable ionic compound. Alternatively, fluorine could share one electron with the atom with one valence electron, forming a covalent bond, but this is less likely due to the large difference in electronegativity between fluorine and alkali metals.

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D. 1,1,2,1

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:  

Reaction(unbalanced)

Zn+K₂CrO₄ ⇒ K + ZnCrO₄

Give coefficient

aZn+K₂CrO₄ ⇒ bK + cZnCrO₄

Zn, left=a, right=c⇒a=c

K, left=2, right=b⇒b=2

Cr, left=1, right=c⇒c=1⇒a=1

O,left=4,right=4c⇒4c=4⇒c=1

Reaction(balanced0

Zn+K₂CrO₄ ⇒ 2K + ZnCrO₄

Answer:

0.375 moles Al

Explanation:

To find the moles Al, you need to (1) convert grams AlCl₃ to moles AlCl₃ (via molar mass) and then (2) convert moles AlCl₃ to moles Al (via mole-to-mole ratio from equation coefficients). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the given value (50.0 g).

Molar Mass (AlCl₃): 26.982 g/mol + 3(35.453 g/mol)

Molar Mass (AlCl₃): 133.341 g/mol

2 Al(s) + 3 CuCl₂(aq) -----> 3 Cu(s) + 2 AlCl₃(aq)

50.0 g AlCl₃           1 mole                 2 moles Al
--------------------  x  ------------------  x  -----------------------  =  0.375 moles Al
                               133.341 g           2 moles AlCl₃

Answer:3,4,1,2

Explanation:

hope this helped

2.56 x 10²² propane molecules must be burned with 6.82 grams of oxygen.

The following is the balanced equation for propane combustion:

\(C3H8 + O2 = 3CO2 + 4H2O\)

Hence, we require 5 oxygen molecules for every molecule of propane.

We must multiply the quantity of propane molecules by the ratio of oxygen molecules to propane molecules in order to determine how many oxygen molecules are needed to burn 2.56 x 1022 propane molecules.

\(O2\) to \(C3H8\) Ratio: 5:1

The necessary number of O2 molecules is (5/1) times 2.56, which equals 1.28 x 10²³.

So, using the molar mass of oxygen, we can convert the quantity of oxygen molecules to grams.

1 mole of \(O2\) = 32 g

1.28 x 10²³ molecules of O2 = (1.28 x 10²³/ 6.022 x 10²³) moles of O2

Mass of \(O2\) = (1.28 x 10²³/ 6.022 x 10²³) x 32 g.

Mass of \(O2\) = 6.82 grams.

Hence, 6.82 grams of \(O2\) are required to burn 2.56 x 10²² propane molecules.

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Answer:

Explanation:

4 moles of measure or handle a dozen or a ream of atoms.

An atom of the chemical element hydrogen is known as a hydrogen atom. The Coulomb force holds a single positively charged proton and a single negatively charged electron to the nucleus of the electrically neutral atom.

Isolated hydrogen atoms, often known as "atomic hydrogen," are highly uncommon in normal life on Earth. In contrast, a hydrogen atom usually joins forces with other atoms to form compounds or with another hydrogen atom to generate common (diatomic) hydrogen gas, H2.

In everyday English, the terms "atomic hydrogen" and "hydrogen atom" have similar but distinct meanings. A water molecule, for instance, has two hydrogen atoms but no atomic hydrogen (which would refer to isolated hydrogen atoms).

Therefore, 4 moles of measure or handle a dozen or a ream of atoms.

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1) List the known and unknown quantities.

Final conditions

Volume 2: 10.0 L

Concentration 2: 1.2 M

Final conditions

Volume 1: 2.5 L

Concentration 1: unknown

2) Set the equation

3) Plug in the known values and solve for C1

The molarity would be 4.8 M.

.

Answer:

the roller coaster car with the least potential energy would be the one at the bottom of the roller coaster

Explanation:

Hope this helped

Answer:

the one with the lower ionization energy is more likely to be positive as it is easier to remove the valence electron that causes the positive charge

element a is likely in the s block as that is a low ionization energy and they get larger as you move up and to the R in the table

and element b is likely in the p block for the same reason

Explanation:

Answer: It would take 300 light years to reach Earth.

Explanation:

Approximately 232,474 coulombs of charge are needed to reduce 127 g of chromium(III) chloride to chromium metal by electrolysis.

What is Electrolysis?

Electrolysis is a process in which an electric current is passed through an electrolyte, which is a substance that conducts electricity when dissolved in a liquid or melted. During electrolysis, the electric current causes chemical reactions to occur at the electrodes (conductors that contact the electrolyte), resulting in the transfer of electrons and the conversion of the electrolyte into new substances.

The amount of charge required to reduce a given amount of a substance by electrolysis can be determined using Faraday's laws of electrolysis. The first law of electrolysis states that the amount of a substance produced or consumed by electrolysis is directly proportional to the amount of electric charge passed through the electrolyte. The proportionality constant is known as the Faraday constant, which is equal to 96,485 coulombs per mole of electrons.

To determine the amount of charge required to reduce 127 g of chromium(III) chloride to chromium metal, we first need to calculate the number of moles of electrons required for the reduction reaction. The balanced chemical equation for the reduction of Cr(III) to Cr is:

Cr3+ + 3 e- → Cr

This equation shows that 3 moles of electrons are required to reduce 1 mole of Cr(III) to Cr. The molar mass of CrCl3 is 158.36 g/mol, so the number of moles of CrCl3 in 127 g of the compound is:

n = m/M = 127 g / 158.36 g/mol = 0.802 mol

Therefore, the number of moles of electrons required to reduce 127 g of CrCl3 to Cr is:

n(e-) = 3 x n = 3 x 0.802 mol = 2.406 mol of electrons

Finally, we can use Faraday's law to calculate the amount of charge required to produce this amount of electrons:

Q = n(e-) x F

Q = 2.406 mol x 96,485 C/mol = 232,474 C

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The temperature T converted in SI units is 201.666 K.

To convert -71.484 °C to SI units, we first need to convert it to Kelvin (K) as Kelvin is the SI unit for temperature. We can do this by adding 273.15 to -71.484 °C, giving us a result of 201.666 K.

It is important to note that when converting between units, we need to ensure that we maintain the correct number of significant digits. In this case, the original temperature measurement had six significant digits, so our final answer should also have six significant digits. Therefore, our final answer for the temperature in SI units is 201.666 K.

In summary, the physical chemist measured a temperature of -71.484 °C inside a vacuum chamber, which we converted to SI units by adding 273.15 to get 201.666 K. It is important to maintain the correct number of significant digits throughout the conversion process.

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The correct option is D), Material Safety Data Sheet (MSDS)

The proper handling procedures for substances such as chemical solvents are typically outlined in the Material Safety Data Sheet (MSDS). MSDS is a comprehensive document prepared and provided by the manufacturer or supplier of hazardous chemicals to inform employees and the public about the properties of the chemicals, the associated hazards, and the safety measures necessary for their use, handling, storage, and transport. It contains information on the chemical's physical and chemical properties, health hazards, reactivity, environmental hazards, protective equipment, safe handling practices, and emergency procedures. The MSDS is a critical component of an organization's chemical management program as it helps reduce the risk of accidents, incidents, and injuries from exposure to hazardous chemicals. The information in the MSDS is presented in a standardized format to ensure consistency in the presentation of information across different products and manufacturers. The MSDS should be readily available to workers who use or handle hazardous chemicals, and it should be reviewed and updated regularly to reflect any changes in the properties or hazards of the chemical.

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In this question, we have a situation where an ice cube is placed in a glass of hot water, which means we have a situation of exothermic and endothermic reactions occurring.

The endothermic reaction will be related to the ice cube, since this cube will increase its temperature, and in order to do that, the cube needs to absorb energy, and this thermal energy will come from the hot water

The exothermic reaction is the hot water releasing this thermal energy to its surroundings, and then the temperature will decrease as well

The options that are the answers will be:

C

F

Letter B should be the opposite, -qwater = qice, and letter A doesn't show the positive or negative sign

Explanation:

i dont know 8th and i am not sure baout carbonic acid in 10 th but they are balanced

When ethyl chloride (CH3CH2Cl) is dissolved in 1.0 M NaOH, it undergoes a reaction to form ethanol (CH3CH2OH) and chloride ions (Cl-). This reaction occurs at 25°C and follows a first-order rate law with a rate constant of 4.3 × 10^-3 s^-1.

The activation energy (EA) is not provided in the question, so it is unclear what information you are looking for. However, I can provide some general information about activation energy.

Activation energy is the minimum amount of energy required for a chemical reaction to occur. It determines the rate at which the reaction proceeds. Higher activation energy means a slower reaction rate, while lower activation energy leads to a faster reaction rate.

In this specific reaction, the rate constant and temperature are given, but the activation energy is missing. To determine the activation energy, you would need additional information, such as the Arrhenius equation, which relates the rate constant, activation energy, and temperature.

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THE conjugate acid, within the acid–base theory, is a chemical compound formed by the reception of a proton by a base—in other words, it is a base with a hydrogen ion added to it, as in the reverse reaction it loses a hydrogen ION.