what is the percent by mass of oxygen in magnesium oxide, mgo?

If H₂ is removed from the reaction CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g) at equilibrium, the value of Keq for the reaction will remain unchanged.

Keq, or the equilibrium constant, is a ratio of the concentrations of products to reactants at equilibrium, with each concentration raised to the power of its stoichiometric coefficient. It represents the extent of the reaction at equilibrium.

When H₂ is removed from the reaction mixture, according to Le Chatelier's principle, the equilibrium will shift to counteract the change. In this case, the forward reaction will be favored to replenish the removed H₂. As a result, more H₂ will be produced until a new equilibrium is established.

However, the equilibrium constant Keq is determined solely by the stoichiometry of the balanced chemical equation and the temperature. Since the stoichiometry and the coefficients of the balanced equation remain unchanged, Keq will not be affected by the removal of H₂. The concentrations of the remaining species, CO, H₂O, and CO₂, may change, but the ratio of their concentrations at equilibrium will still be represented by the same Keq value.

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At time = 1, one of the H₂ molecules has reacted, producing one molecule of HI. This means that there are now 0.5 moles of H₂, 0.5 moles of I₂, and 1 mole of HI in the container.

At time = 3, the reaction has reached equilibrium. This means that the concentrations of all three gases have stabilized. Without additional information about the reaction conditions and equilibrium constants, we cannot determine the exact concentrations of each gas at equilibrium.

Between time = 1 and time = 2, the forwards reaction (H₂ + I₂ → 2HI) is favored because one of the H₂ molecules has reacted to produce HI. This means that the concentration of H₂ has decreased while the concentration of HI has increased, driving the reaction forwards according to Le Chatelier's principle.

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Answer:

0.409 m

Explanation:

The molarity of the original K₂CO₃ solution given the data from the question is 0.409 M

H₂SO₄ + K₂CO₃ —> K₂SO₄ + CO₂ + H₂O

From the balanced equation above,

MaVa / MbVb = nA / nB

(0.25 × 38.4) / (Mb × 23.5) = 1

9.6 / (Mb × 23.5) = 1

Cross multiply

Mb × 23.5 = 9.6

Divide both side by 23.5

Mb = 9.7 / 23.5

Mb = 0.409 M

Thus, the molarity of the K₂CO₃ solution is 0.409 M

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A: "Freezing" is an endothermic process.

Freezing is the process of changing a substance from a liquid to a solid state, and it is endothermic because it absorbs heat from its surroundings in order to cause the change of state. As the temperature of the substance decreases, the liquid molecules slow down and eventually form a solid structure. The heat absorbed during this process can come from the surrounding environment or from the substance itself.

On the other hand, melting, condensing, and deposition are exothermic processes, meaning they release heat.

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Answer:

b

Explanation:

a drug problem consumes the bulk of a persons income because drugs are expensive to buy

A drug problem can quickly consume the bulk of a person income

A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drug abuse or substance abuse refers to the use of certain chemicals for the purpose of creating pleasurable effects on the brain.

Drug use can have significant and damaging short-term and long-term effects. Taking some drugs can be particularly risky, especially if you take high doses or combine them with other drugs or alcohol.

People of any age, sex or economic status can become addicted to a drug. Certain factors can affect the likelihood and speed of developing an addiction.

The best way to prevent an addiction to a drug is not to take the drug at all. If your doctor prescribes a drug with the potential for addiction, use care when taking the drug and follow the instructions provided by your doctor. Thus you can save your income.

The correct answer is option B.

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To produce 1000 kg of fishmeal (M = 1000 kg), you would need 3000 kg of pasta. To determine the amount of pasta required to produce 1000 kg of fishmeal, we need to consider the mass balance of the process. Let's break down the steps involved:

A. Extraction of fish oil:

The pasta obtained from the extraction stage contains 20% flour and 80% water. To calculate the amount of pasta, we need to determine the mass of flour and water in the pasta. Let's assume the total mass of the pasta is P kg.

Mass of flour = 20% of P = 0.2P kg

Mass of water = 80% of P = 0.8P kg

b. Drying of pasta:

During the drying stage, the pasta is dried in a rotary drum, resulting in fishmeal with 40% humidity. This means that the final fishmeal will contain 60% dry matter.

Let's assume the mass of the dried fishmeal is M kg.

Mass of dry matter = 60% of M = 0.6M kg

Since the dry matter in the fishmeal comes from the flour in the pasta, we can equate the mass of dry matter to the mass of flour:

0.6M kg = 0.2P kg

To produce 1000 kg of fishmeal, we want to find the corresponding value of P:

0.6M = 0.2P

P = (0.6M) / 0.2

P = 3M

Therefore, to produce 1000 kg of fishmeal (M = 1000 kg), you would need 3000 kg of pasta.

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Answer:

A. Things are measured the same way each time.

Explanation:

Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

What are Molecules ?

Molecules are the combination of two or more different atoms combine in a fixed ratio.

Molecules can be independently founded.

Atoms are always founded in combined state and does not occurs independently except rare earth elements which belongs to 18th group of periodic table.

Chemicals are taken in compound state But they undergo chemical reaction individually in molecular level.

Hence, Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

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A chemical property of aluminium is that it corrodes with air. Hence, option A is the correct answer.

When aluminium is exposed to air, a thin layer of aluminium oxide is formed on the surface of the metal. This layer acts as a protective coating, preventing further corrosion of the metal.

Aluminum is a light metal with a silvery white color. It is flexible and pliable. Cans, foil, kitchen utensils, window frames, beer kegs, and airplane parts are just a few examples of the many products for which aluminum is used.

In the manufacturing of coils, cans, foils, and other wrapping materials, aluminum is frequently used. It is also a component of a lot of things that are used frequently, like watches and utensils. Aluminum is used to make roofs, doors, windows, wires, and roofing in the construction industry.

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Answer:

(b)  19.9 moles

Explanation:

To convert from moles Al to moles O₂, you need to multiply the given value by the mole-to-mole ratio of each component. This ratio is constructed via the coefficients in the balanced reaction. The desired unit (moles O₂) should be placed in the numerator to allow for the cancellation of units.

2 Al₂O₃ ----> 4 Al + 3 O₂
                    ^         ^            

26.5 moles Al           3 moles O₂
---------------------  x  ----------------------  =  19.9 moles O₂
                                 4 moles Al

Answer:

it form a negative ion because the no. of negative charges exceeds that of the positive charges

Answer:

Matter is any substance, if it is made up of only one kind of atom, then it is an element. Elements consists of atoms with the same weight and same number of protons in the nuclei.

Answer:

c because this is the one hundred all the time

Explanation:

Size of an atom increases as we move down a group and from left to right across a period

Define an atom?

An atom is a unit of matter that specifically characterizes a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are comparatively heavy particles, can be found in the positively charged nucleus.

In a group, as the atomic number rises, the atomic size expands from top to bottom. Valence electrons are located farther from the nucleus because there are more filled energy levels, which increases atomic size.

Atomic size grows as a function of period number, number of shells, and so forth. Since there are more electrons in each shell as we move from left to right in a period, the force of attraction between the nucleus and electrons, which have positive charges, is stronger, bringing the shells closer to the nucleus and shrinking the size of the atom.

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Answer:

I'm pretty sure its condensation The energy absorbed causes the molecules to change patterns. hope i helped

21 L moles of hydrogen were added because hydrogen may make many metals, particularly the carbon steel often used in gas pipes, brittle.

Where may hydrogen be found?

Hydrogen is still a characteristic of something like the sun or most stars; it also makes up the bulk of Jupiter. Hydrogen in the form of water is the type of hydrogen that is most prevalent on Earth. It is a gas that is only very weakly presence in the atmosphere, with a physical concentration compared with fewer than 1 part per million.

H2 or H2o: which is hydrogen?

Hydrogen, with a molecular concentration of 1, is represented by the chemical formula H2. That lightest material is hydrogen, symbol H, which has atomic number one. The gas, which has the chemical formula H2, is extremely flammable, tasteless, and white.

Briefing:

V₁/n₁  =  V₂/n₂

3.9 L / 2.6 mol =  V₂/ 14 mol

V₂ =3.9 L × 14 mol  / 2.6 mol

V₂ = 54.6 L /2.6

V₂ = 21 L

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The purpose is to evaluate any differences in sign or magnitude between the theoretical predictions based on standard reduction cell potentials and the actual experimental results.

In the given table, the standard reduction potentials are listed for each voltaic cell. These values represent the potential difference between the anode and cathode in each cell.

By comparing these calculated cell potentials with the measured values, any differences in sign or magnitude can be observed.

The calculated cell potentials are based on theoretical values and assume ideal conditions, while the measured values take into account real-world factors such as temperature, concentration, and electrode surface area.

Differences in sign may arise due to the reversal of anode and cathode in the experimental setup, while differences in magnitude can be attributed to various factors affecting the efficiency of the electrochemical reactions, such as concentration gradients and kinetic limitations.

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Answer:

a charge on a solar battery cell

ANSWER:

Fe(OH)2

Explanation:

Fe(OH)2

The highest iron content.

A compound is a substance that consists of the atoms or the ions of the two or more different elements that are joined by a chemical bond and can't be separated by any physical means. Like water is a compound of oxygen and hydrogen.

This the answer is Fe(OH)2.

Hence the option D is correct.

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ΔH° for the reaction Fe3O4(s)+2C (graphite) → 3 Fe(s) + 2CO2(g) is - 725kj/mol⁻¹.

Hess's law states that if a process can be showed as the sum of two or more steps, the enthalpy change for the overall process is the sum of the ΔH values for each step.

Fe3O4(s)+2C (graphite) → 3 Fe(s) + 2CO2(g),    

We invert (1) and change the sign of  ΔH

Fe3O4(s)   →  3Fe(s)+3CO2(g)  ΔH = 1118

We multiply (2) by 3

2C(g)+1/2O2(g) → CO2(g)         ΔH = - -394   (2)

3CO(g)+3/2O2(g)→3CO2(g)         ΔH = 1118

We add (1) and (2)

Fe3O4(s)  →  3Fe(s)+3CO2(g)  ΔH = 824.2 kJ

3CO(g)+3/2O2(g)→3CO2(g)         ΔH = -848.1 kJ

Fe3O4(s)+2C (graphite) → 3 Fe(s) + 2CO2(g),    

Therefore, ΔH° = - 725kj/mol⁻¹

Thus,  ΔH° for the reaction Fe3O4(s)+2C (graphite) → 3 Fe(s) + 2CO2(g) is - 725kj/mol⁻¹.

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The carbonyl stretching frequency in the infrared spectrum depends on the nature of the carbonyl group and the adjacent functional groups or substituents. Based on this, we can rank the given molecules in terms of their carbonyl stretching frequency, from highest to lowest:

2,4-cyclohexadienone > 2-cyclohexenone > cyclohexenone > cyclohexanone

In general, a carbonyl group adjacent to an electron-withdrawing group will have a higher stretching frequency compared to a carbonyl group adjacent to an electron-donating group.

In 2,4-cyclohexadienone, the two carbonyl groups are conjugated with each other and with the double bonds in the ring, resulting in a very high carbonyl stretching frequency. In 2-cyclohexenone, the carbonyl group is conjugated with the double bond in the ring, resulting in a slightly lower stretching frequency.

In cyclohexenone, the carbonyl group is adjacent to a single double bond in the ring, resulting in a lower stretching frequency compared to 2-cyclohexenone. In cyclohexanone, the carbonyl group is not conjugated with any other functional group, resulting in the lowest carbonyl stretching frequency among the given molecules.

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Answer:

D

Explanation:

Does not require energy ...may be slow or fast....

The structure of compound A can be predicted from the provided IR and 1H NMR data as follows:

IR data

1H NMR Data:

The peak at 9.979 ppm (PAM) in the 1H NMR spectrum indicates the presence of C=O group in this structure. The benzene ring in the structure is symbolized as an aromatic ring. Protons near the aromatic ring are responsible for the peaks at 7.887 ppm and 7.213 ppm.

The protons next to the \(\rm CH_2\) and \(\rm CH_3\) groups, respectively, are responsible for the peaks at 2.694 ppm and 2.096 ppm. As a quartet, the peak at 2.694 ppm indicates that it is close to two protons (CH group). As for the triplet peak, the peak at 2.096 ppm is close to three protons (\(\rm CH_3\)group).

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Answer:

Part A:

"360 grams of NaCl can be dissolved in 1 L water. So, 2000 grams sugar can be dissolved in 1 L water then we can say that the solubility of salt is lesser in water as to sugar and both heightened by increasing the temperature. If we make a batch of 800 L we can add sugar, 1600 kg at 25 0c. We can add salt is 288 kg at 25 0c and the ingredient tomato is having low solubility."

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Part B:

'Manufacturers can generate new value minimize cost and increase operational stability by focusing on 4 broad areas; Management, Supply Circle, Product Design, and Value Recovery.'

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In order to make tomato soup, the salt NaCl is first added, then followed by sugar and finally the tomato powder.

Tomato soup is made of the following ingredients:

In order to make tomato soup, the salt NaCl is first added, then followed by sugar. This is to ensure increase in the boiling point of water and to reduce the heating time of the tomato soup.

The solution is heated to induce more dissolution if solute and finally the tomato powder is added.

In order to optimize the manufacturing process, changes should be made in the design, supply and composition of the soup.

Therefore, an optimized manufacturing process will reduce cost of production.

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Answer: Galaxy

Explanation: A galaxy is a large system of stars held in place by mutual gravitation.

Combustion and displacement reaction are the types of given chemical reaction. In a chemical reaction, the atoms that make up the reactants.

Chemical reaction, the transformation of one or more chemicals (the reactants) into one or more distinct compounds (the products).

Chemical elements or chemical compounds make up substances. In a chemical reaction, the atoms that make up the reactants are rearranged to produce various products.

C\(_4\)H\(_{10}\) + O\(_2\) → CO\(_2\) + H\(_2\)O

oxygen is not balanced so balanced it

2C\(_4\)H\(_{10}\) + 13O\(_2\) → 8CO\(_2\) + 10H\(_2\)O, this is a combustion reaction.

Fe + CuNO\(_3\) →Fe(NO\(_3\))\(_2\)+Cu

The number of nitrogen atom on left side is 1 while on product side is 2

Fe + 2CuNO\(_3\) →Fe(NO\(_3\))\(_2\)+2Cu

This a displacement reaction.

Therefore, combustion and displacement reaction are the types of given chemical reaction.

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Answer: A hydrocarbon contains 92.3% by mass of carbon and 7.7% by mass of hydrogen. The empirical formula of the compound will be oose answer:

CH CH5 CH CH3.

Explanation: :)

Answer:

Most solar cells are made from silicon—the same semiconductor material that is at the heart of computers. The cells are expensive to produce because it takes a great deal of energy to purify the silicon.