Transition-metal ions with charges larger than +3 cannot exist in an aqueous solution.

Consider the reaction in which manganese is oxidized from the +2 to the +7 oxidation

state under aqueous conditions. Give an account of what exactly happens here, including a

balanced equation (5 mks)

Answer:

13.2 g of gold

Explanation:

We'll begin by converting 5.25 L to ft³.

This can be obtained as follow:

Recall:

1 L = 0.0353 ft³

Therefore,

5.25 L = 5.25 × 0.0353

5.25 L = 1.85×10¯¹ ft³

From the question given above,

2.45 g of gold is present in 5.25 L ( i.e 1.85×10¯¹ ft³) of soil.

Therefore, Xg of gold will be present in 1 ft³ of soil i.e

Xg of gold = 2.45/1.85×10¯¹

Xg of gold = 13.2 g

Therefore, 13.2 g of gold is present in 1 ft³ of the soil.

The most charged oxygen atom that exists in the molecule of water (H2O) is covalently joined to hydrogen. As a result, the hydrogen nucleus on one water molecule interacts with that of oxygen on another water molecule via a dipole.

Hydrogen ties form between nearby oxygen and hydrogen atoms liquid adjacent water molecules in this instance of water. A bond called a hydrogen bond, it is generated via an attraction among two water molecule molecules.

Water exhibits H-bonding because it includes oxygen. Because hydrogen bonds are not present in the acid hydrochloric, it lacks oxygen, nitrogen, and fluorine. Therefore, option (d) — hydrochloric acid — is the correct response.

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1. Conduction : direct contact

2. Convection : hot & cold liquid motion

3. Radiation :  via electromagnetic waves & warm gas rising

1. Conduction: This has to do with the transfer of heat from one medium to another having direct contact with each other, the medium can either be solid or liquids

2. Convection: Has to do with the transfer of heat energy via molecules of the liquids in motion with different or varying temperature gradients

3. Radiation: Mostly occurs in gases, it is the transfer of energy through waves

Answer:

Limiting reagent is the potassium carbonate.

Percent yield of calcium carbonate is: 39.3 %

Explanation:

The reaction is:

CaCl₂ + K₂CO₃ → CaCO₃ + 2KCl

Formula for percent yield is:

(Produced yield / Thoeretical yield) . 100

Firstly we determine the moles of each reactant, in order to say what is the limiting reagent: ratio is 1:1.

1 mol of chloride need 1 mol of carbonate.

14.570 g . 1 mol /110.98 g = 0.131 moles of CaCl₂

12.285 g . 1 mol / 138.2g = 0.0889 moles of carbonate.

Limiting reagent is carbonate. For 0.131 moles of CaCl₂ we need the same amount of carbonate and we have less moles.

Ratio is also 1:1, with calcium carbonate.

1 mol of potassium carbonate produces 1 mol of calcium carbonate

then, 0.0889 moles will produce the same amount of CaCO₃

We convert moles to mass: 0.0889 mol . 100.08g /mol = 8.89 g

That's the theoretical yield; to find the percent yield:

(3.494 g / 8.89g) . 100 = 39.3%

Answer:

1.674 x 10^-23 grams

Explanation:

Hydrogen-1 is called Protium

wikipedia

atomic mass of Protium is 1.00794 amu

sciencedirectcom

atomic mass of 10 Protiums is 10.0794 amu

10.0794 amu in grams is

1.6737236x10^-23 grams

46. Covalent bonds are formed by sharing electrons between atoms.

Covalent bonds are chemical bonds formed when two atoms share electrons. They occur between nonmetal atoms and involve the sharing of electron pairs, resulting in the formation of a stable molecule. Covalent bonds are typically found in molecular compounds.

47. Ionic bonds are formed by gaining or losing electrons between metals and nonmetals.

48. A subscript is used in a formula to indicate the number of atoms of an element in a compound.

49. Chemical reactivity or stability depends on the number of outer energy levels (valence shells) in atoms.

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HCN, Na2SO4: Combination of compounds.

Mg3N2: Chemical compound.

CO2, H2O: Dissolution or hydration reaction.

Cu, Zn(NO3)2: Single-replacement reaction.

Na, N2: Combination of elements.

Let's analyze each chemical combination to determine the type of reaction involved:

HCN, Na2SO4:

The combination of hydrogen cyanide (HCN) and sodium sulfate (Na2SO4) does not represent a specific chemical reaction. It is simply the combination of two compounds.

Mg3N2:

Mg3N2 represents a chemical compound, magnesium nitride. It does not indicate a specific reaction.

CO2, H2O:

The combination of carbon dioxide (CO2) and water (H2O) represents a chemical reaction known as hydration or dissolution. When carbon dioxide dissolves in water, it forms carbonic acid (H2CO3), which can further dissociate into hydrogen ions (H+) and bicarbonate ions (HCO3-).

Cu, Zn(NO3)2:

The combination of copper (Cu) and zinc nitrate (Zn(NO3)2) represents a single-replacement reaction. Copper displaces zinc from the compound, resulting in the formation of copper nitrate (Cu(NO3)2) and zinc metal (Zn).

Na, N2:

The combination of sodium (Na) and nitrogen gas (N2) does not represent a specific reaction. It is simply the combination of two elements.

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Answer:

the rate of a reaction is measured by how fast a REACTANT is used up or how fast a PRODUCT is formed

Answer:

There are 18 moles of oxygen in 3.0 mole of glucose...

Explanation:

Does it help???

Answer:

18.066× 10²³ molecules

Explanation:

Given data:

Number of moles of oxygen = 3.0 mol

Number of molecules = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

3 mol  × 6.022 × 10²³ molecules  / 1 mol

18.066× 10²³ molecules

The reaction is:

So for every molecule of nitrogen we need 3 molecules of hydrogen.

Now, we have 4 molecules of nitrgen, so if the total amount of nitrogen react we would need 4x3=12 molecules of hydrogen.

We know that there are only 9 molecules of hydrogen present, so it is not possible that all the nitrogen present react. Therefore the limiting reactant is hydrogen.

To answer how many molecules of ammonia (NH3) are produced we need to calculate the amount formed if all the hydrogen present reacts:

For every 3 molecules of hydrogen 2 molecules of ammonia are formed, so for 9 molecules of hydrogen the molecules of ammonia formed are: 2x3=6.

To form 6 molecules of ammonia there are needed 6/2=3 molecules of nitrogen, so only one remains after the reaction.

To summerize:

• The number of molecules of ammonia formed are 6

• The limiting reactant is hydrogen

• The number of molecules remaining after the reaction are:

molecules of hydrogen: 0

molecules of nytrogen: 1

The functional features which the phosphate group contribute to the structure of a phospholipid are:

Phospholipids are derivatives of lipid compounds that contain a phosphate ester group. This compound is one of the building blocks of living cell membranes, along with glycolipids, cholesterol, and proteins. Phospholipids contained in cell membranes belong to the type of phosphoglycerides, which are alcohol and phosphatidic derivatives.

The characteristics of phospholipids are as follows.

Your question is incomplete but most probably your full question was:

What functional features does the phosphate group contribute to the structure of a phospholipid?

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Answer:

323.15 or just 323 depending on the teacher

Answer:

21

Explanation:

bcecause thats the only one

We must melt about 3.8 kg of brass A, 4.1 kg of brass B, and 6.5 kg of brass C to obtain about 14.5 kg of the desired alloy

we can set up a system of equations based on the conservation of mass and the desired composition:

0.533x + 0.247y + 0.220z = 14.5 (desired composition of copper, zinc, and nickel)

The given information includes:

Brass A: 41% copper, 23% zinc, 36% nickel

Brass B: 54% copper, 23% zinc, 23% nickel

Brass C: 56% copper, 26% zinc, 18% nickel

Using this information, we can write the following equations:

0.41x + 0.54y + 0.56z = 0.533(x + y + z) (copper)

0.23x + 0.23y + 0.26z = 0.247(x + y + z) (zinc)

0.36x + 0.23y + 0.18z = 0.220(x + y + z) (nickel)

Simplifying each equation, we get:

0.067x - 0.027y - 0.023z = 0 (copper)

-0.017x + 0.017y + 0.003z = 0 (zinc)

-0.020x - 0.027y + 0.038z = 0 (nickel)

We can solve the equations using substitution method or elimination method and our values will be:

x = 3.8462

y = 4.1077

z = 6.5461

In conclusion, we need to melt about 3.8 kg of brass A, 4.1 kg of brass B, and 6.5 kg of brass C to obtain about 14.5 kg of the desired alloy.

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The statement that best describes how the radioactivity was distributed in one of the first molecules of Protein X that was completely translated is B. Radioactive amino acids were located only at one end of the molecule.

Protein X was one of the first molecules to be completely translated, and the distribution of its radioactivity was unique. Radioactive amino acids were not dispersed throughout the molecule, but instead were located only at one end of the molecule.

This means that the statement B best describes how the radioactivity was distributed in one of the first molecules of Protein X that was completely translated.

With this knowledge, we can be sure that the radioactivity was not evenly distributed throughout the molecule, but was instead concentrated at one end.

This information provides us with a better understanding of the structure of Protein X, and how it is different from other molecules.

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The image is not given in the question, it is attached below:

Answer: The excess reactant is NO, the limiting reactant is CO and the products are shown in the image attached below.

Explanation:

In the given image:

Red spheres represent oxygen atoms, blue spheres represent nitrogen atoms and black spheres represent carbon atoms

The combination of 1 black and 2 red spheres will represent carbon dioxide \((CO_2)\) compound

The combination of 2 blue spheres will represent nitrogen molecule \((N_2)\)

The combination of 1 blue and 1 red sphere will represent nitrogen monoxide \((NO)\) compound

The combination of 1 black and 1 red sphere will represent nitrogen monoxide \((NO)\) compound

Limiting reagent is defined as the reagent which is completely consumed in the reaction and limits the formation of the product.

Excess reagent is defined as the reagent which is left behind after the completion of the reaction.

We are given:

Given moles of NO = 6 moles

Given moles of CO = 4 moles

For the given chemical equation:

\(2NO(g)+2CO(g)\rightarrow N_2(g)+2CO_2(g)\)

By stoichiometry of the reaction:

If 2 moles of CO reacts with 2 moles of NO

So, 4 moles of CO will react with = \(\frac{2}{2}\times 4=4mol\) of NO

As the given amount of NO is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.

Thus, CO is considered a limiting reagent because it limits the formation of the product.

Hence, the excess reactant is NO, the limiting reactant is CO and the products are shown in the image attached below.

Answer:

el que paso del one jhaulio

Explanation:

Answer:

d. 117 grams

Explanation:

The mass of the table salt produced will be 117 grams.

Chemical reactions obey the law of conservation of mass. In this regard, matter is neither created nor destroyed in the course of a chemical reaction. It is expected that the mass of the reactants and products remain the same.

 The reaction expression:

         2Na + Cl₂  →   2NaCl

So, mass of sodium  = 46g

      mass of chlorine formed = 71g

Mass of NaCl  = 46 + 71 = 117g

The ionization of the following acids can be represented as:

Tetraoxosulphate (VI) Acid (\(H_{2}SO_{4}\)) ionizes as H+ and SO4^2- ions.

Trioxonitrate (V) Acid (\(HNO_{3}\)) ionizes as H+ and \(NO_{3-}\) ions.

Ethanoic Acid (\(CH_{3}COOH\)) ionizes as H+ and \(CH_{3}COO^{-}\) ions.

Tetraoxosulphate (VI) Acid, also known as sulfuric acid (\(H_{2}SO_{4}\)), ionizes as follows:

\(H_{2}SO_{4}\) → \(H+\) + \(SO_{4}^{2-}\)

In this reaction, sulfuric acid donates two hydrogen ions (H+) to the solution, forming sulfate ions (\(SO_{4}^{2-}\)).

Trioxonitrate (V) Acid, commonly known as nitric acid (\(HNO_{3}\)), ionizes as follows:

\(HNO_{3}\) → \(H+_{}\) + \(NO_{3-}\)

Nitric acid dissociates to release one hydrogen ion (\(H+\)) and a nitrate ion  (\(NO_{3-}\)).

Ethanoic Acid, also known as acetic acid (\(CH_{3}COOH\)), ionizes as follows:

\(CH_{3}COOH\) → H+ + \(CH_{3}COO^{-}\)

Acetic acid donates a hydrogen ion (H+) to the solution, forming an acetate ion (\(CH_{3}COO^{-}\)).

In all cases, the acids dissociate in water, producing hydrogen ions (H+) as positively charged ions and their corresponding anions. The hydrogen ions are responsible for the acidic properties of these substances, while the anions contribute to the overall charge balance in the solution. The ionization of acids allows them to conduct electricity in aqueous solutions and react with other substances.

The question was incomplete. find the full content below:

Indicate the ionization of the following acids,

Tetraoxosulphate (VI) Acid

Trioxonitrate (V) Acid

Ethanoic Acid.​

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Answer:

18 c

19 b

20 a

21 a

Explanation:

18 LiOH is a powerful base citric acid is a weak acid so when we mix a powerful base with a weak acid mixture become basic

when we mix powerful base with a powerful acid it becomes neutral(need to take equal quantities)

when we mix powerful acid with weak base mixture becomes acidic

when we mix weak acid with weak base we cannot tell what happens to find this we need to do some calculations

19 when the ka value is high it becomes more acidic

20 A polyprotic acid is an acid that can donate more than one proton or hydrogen atom per molecule to an aqueous solution. In contrast, a monoprotic acid (e.g., HCl) can only donate one proton per molecule.

so here it has 3H so it can donate 3H+

in here we need to write the ionization of the acid in water

do the answer is a

21 A proton acceptor is another name for a base, which is the opposite of an acid. In the Broensted-Lowry definition, a base is a negatively charged ion that will react with, or accept, a positively charged hydrogen ion. Since a hydrogen ion is a proton, the base is called a proton acceptor.

an acid is any proton donor, and a base is any proton acceptor. The focus of this definition is on donating and accepting protons, and is not limited to aqueous solution. The Brønsted-Lowry definition of acids and bases is one of two definitions we commonly use

Answer:

Water

Explanation:

It is because water can be in a solid state which is ice, liquid state which is the water and gas which is the steam that comes from water

Explanation:

water as a matter could co-exist in four forms

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 16.93 g

volume = final volume of water - initial volume of water

volume = 19.7 - 11.2 = 8.5 mL

We have

\(density = \frac{16.93}{8.5} \\ = 1.9917647058...\)

We have the final answer as

Hope this helps you

Explanation:

It is the emission of electron from a metal under the effect of light is known as photo electric effect

I hope this imformation help full for you

Answer:

coefficients

Explanation:

If calibration is to 2 ml, it means that cylinder is marked with calibration lines at every 2 ml interval. So, we can estimate the volume of liquid in the cylinder to the nearest 2 ml.

In chemistry, calibration is defined as the act of making sure that any scientific process/ instrument produce results which are accurate.

If calibration is to 2 ml, it means that cylinder is marked with calibration lines at every 2 ml interval. So, we can estimate the volume of liquid in the cylinder to the nearest 2 ml.

For example, if the bottom of the meniscus of liquid in the cylinder is at 6 ml mark and the top of the meniscus is between the 14 ml and 16 ml marks, we can estimate that the volume of liquid in cylinder is between 6 ml and 16 ml, but we cannot estimate a value in between such as 8 ml or 10 ml.

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Answer:

Jaheem has a goal running a total of 125 miles this month. Each day that he ran, he ran 7 miles. Which expression could Jaheem use to determine how many miles he has left to run after running for d days?

x a.

125 – 7d

x b.

7d + 125

x c. fraction numerator 125 over denominator 7 d end fraction

x d.

7dExplanation:Jaheem has a goal running a total of 125 miles this month. Each day that he ran, he ran 7 miles. Which expression could Jaheem use to determine how many miles he has left to run after running for d days?

x a.

125 – 7d

x b.

7d + 125

x c. fraction numerator 125 over denominator 7 d end fraction

x d.

7d

Answer:

Only 4 %

Explanation:

Just about 4 percent of the known universe overall mass consists of atomic nuclei and is therefore described by chemical components. This proportion is around 15 percent of the total mass, with dark energy becoming the majority of the material .

Answer: The process by which the particles can reconvene entirely in one of the flasks is: NONSPONTANEOUS.

Explanation:

The spontaneity of a process can affect the distribution of energy and matter within the system. Different chemical or physical processes have the natural tendency to occur in one direction under a given set of conditions. For example:

--> when water is pour down a hill it naturally flows down but it requires outside energy maybe from a water pump to flow up the hill and ,

--> during an iron rust, iron that is exposed to atmosphere will corrode, but rust is not converted to iron without intentional chemical treatment.

Therefore, a spontaneous process is one that occurs naturally under certain conditions. While a NONSPONTANEOUS process, on the other hand, will not take place unless it is initiated by the continual input of energy from an outside source. A process that is spontaneous in one direction under a particular set of conditions is nonspontaneous in the REVERSE direction.

From the two flasks that where connected through a valve, once the valve was opened, the gas spontaneously becomes evenly distributed between the flasks. To reverse this, it would require an external energy making the reconvening of the particles back to the first flask a NONSPONTANEOUS PROCESS .

Answer:

(a) PbSO4 anode is reduced to Pb.

Explanation:

Cells which can be recharged are known as secondary cells. They can be recharged by passing a direct current through them. An example of a secondary cell is the lead storage battery used in motor cars.

During the process of recharging, the electrodes in the cell are reversed from what we have  know to occur during discharging because it is electrolized.

At the anode: The lead (II) tetraoxosulphate (VI)  absorbs two electrons to become reduced to Pb. Thus at the anode PbSO₄ is reduced to Pb.

\(PbSO_4+2e^-\rightarrow Pb+SO_4^{2-}\)

At the cathode:

The electrons from the anode are accepted at the cathode where the lead (iV) oxide is oxidised into lead (II) ions.

\(PbSO_4+2H_2O\rightarrow PbO_2+SO_4^{2-}+4H^++2e^-\)