What is the mass percent of an ammonium carbonate solution prepared by dissolving of solid into of water?

Answer:

3 electrons

Explanation:

Answer:

C

Explanation:

i took the test

The temperate climatic zone has hot summers, cold winters, and average amounts of precipitation throughout the year. Thus, option C is correct.

The climatic zone may be defined as a world area or part discerned from a neighbor by a significant physical climatic attribute that is of a transnational scale.

The movement of the sun from the tropic of cancer to the tropic of Capricorn determines the climate of a particular zone. The equator zone is more consistent with climatic attributes. The tropical zone has seasonal climatic attributes.  

Therefore, the correct option is C.

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The 187.9 grams of sulfur dioxide will be produced when 100 grams of hydrogen sulfide react with 100 grams of oxygen.

To solve this problem, we need to balance the chemical equation first:

H2S + O2 -> SO2 + H2O

The balanced equation shows that one mole of hydrogen sulfide reacts with one mole of oxygen to produce one mole of sulfur dioxide and one mole of water.

To determine how many grams of sulfur dioxide will be produced, we need to find out which reactant is limiting and which is in excess.

First, we need to calculate the number of moles of each reactant, using their molar masses:

Molar mass of H2S = 34.08 g/mol

Number of moles of H2S = 100 g / 34.08 g/mol = 2.936 mol

Molar mass of O2 = 32.00 g/mol

Number of moles of O2 = 100 g / 32.00 g/mol = 3.125 mol

According to the balanced equation, the reaction requires one mole of O2 for every one mole of H2S. Since we have more moles of O2 than H2S, oxygen is in excess and hydrogen sulfide is limiting.

Therefore, the amount of sulfur dioxide produced will depend on the amount of hydrogen sulfide present. From the balanced equation, we know that 1 mole of H2S produces 1 mole of SO2. So, the number of moles of SO2 produced will be equal to the number of moles of H2S.

Number of moles of SO2 produced = 2.936 mol

Finally, we can calculate the mass of sulfur dioxide produced using its molar mass:

Molar mass of SO2 = 64.06 g/mol

Mass of SO2 produced = 2.936 mol x 64.06 g/mol = 187.9 g

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Answer:

C. solid iodine subliming into a gas

Explanation:

A physical change is a change that is reversible and can be reversed back into the original product. The atoms and molecules undergoes some rearrangement in the physical change. The process of change in the state of matters are placed under physical change. Solid iodine sublimes into purple gas on heating. The gas is then changed back to iodine crystals after being cooled. Hence, this is an example of a physical change.

Fatty acid groups are referred to as B) acyl groups.

Fatty acids are organic compounds that consist of a long hydrocarbon chain with a carboxyl group (-COOH) at one end. The hydrocarbon chain is composed of carbon and hydrogen atoms, and its length can vary. Fatty acids play essential roles in various biological processes and are major components of lipids, including triglycerides and phospholipids.

When a fatty acid is involved in chemical reactions or is attached to other molecules, it typically undergoes a process called activation, where it is converted into an acyl group. An acyl group is formed by replacing the -OH (hydroxyl) group of the carboxyl group with an -OR (alkoxy) group. The -OR group can be derived from various molecules, such as coenzyme A (CoA) or other acyl carrier proteins.

For example, when a fatty acid is activated for incorporation into a triglyceride molecule, it forms a triglyceride acyl group. Similarly, when a fatty acid is incorporated into a phospholipid molecule, it forms a phospholipid acyl group. The acyl group represents the hydrocarbon chain of the fatty acid, which may vary in length and saturation.

Therefore, the correct answer to the question is B) Acyl.

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Answer:

its c

Explanation:

In the given reaction CH3COOH → CH3COO^- + H+, the statement "CH3COO^- is a conjugate base" is true.The statement "CH3COO^- is a conjugate base" is true for the given reaction.

In the Brønsted-Lowry theory of acids and bases, an acid is a species that donates a proton (H+), while a base is a species that accepts a proton. In this reaction, CH3COOH donates a proton to form CH3COO^- and H+. The species that remains after the acid donates a proton is called the conjugate base.

In the reaction, CH3COOH acts as the acid by donating a proton, and CH3COO^- is the species that forms after the donation. Since CH3COO^- accepts the proton, it is considered the conjugate base of CH3COOH.

To determine whether a species is an acid or a base, we need to consider its behavior in a given reaction. In this case, CH3COOH donates a proton, making it the Brønsted-Lowry acid, while CH3COO^- accepts the proton, making it the conjugate base.

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Using limiting reactant, 22.8 grams of silver chloride are produced.

The limiting reactant is the reactant that is completely consumed in a chemical reaction and limits the amount of product that can be formed. It is the reactant that is present in the smallest stoichiometric amount compared to the other reactants involved in the reaction

To determine the limiting reactant, we need to calculate the amount of product that can be produced by each reactant and compare the results.

First, we need to convert the given masses of silver nitrate and iron (III) chloride into moles:

27.0 g AgNO₃ * (1 mol AgNO₃/169.87 g AgNO₃) = 0.159 mol AgNO₃

43.5 g FeCl₃ * (1 mol FeCl₃/162.2 g FeCl₃) = 0.268 mol FeCl₃

Next, we need to use the balanced chemical equation to determine the amount of product that can be produced by each reactant:

From the balanced chemical equation, we know that 3 moles of AgCl are produced for every 1 mole of FeCl₃ reacted.

Amount of AgCl produced by AgNO₃:

0.159 mol AgNO₃ * (3 mol AgCl/3 mol AgNO₃) = 0.159 mol AgCl

Amount of AgCl produced by FeCl₃:

0.268 mol FeCl₃ * (3 mol AgCl/1 mol FeCl₃) = 0.804 mol AgCl

Since AgNO₃ produces less AgCl (0.159 mol) than FeCl₃ (0.804 mol), AgNO₃ is the limiting reactant.

Finally, we can calculate the mass of AgCl produced using the amount of AgNO₃ reacted:

0.159 mol AgNO₃* (3 mol AgCl/3 mol AgNO₃) * (143.32 g AgCl/1 mol AgCl) = 22.8 g AgCl

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False

Atomic attributes are attributes that cannot be further divided. They are indivisible attributes that represent the smallest possible unit of information in a given context. For example, in a student record, the atomic attributes could be the student ID number, first name, last name, and date of birth.

In the context of database design, an attribute refers to a characteristic or property of an entity or object. Atomic attributes are those that are indivisible or cannot be further broken down into smaller components within the given context.

Atomicity is an important concept in database normalization, which is the process of organizing data in a database to eliminate redundancy and ensure data integrity. The first normal form (1NF) requires that each attribute in a relation (table) should hold only atomic values. This means that a single attribute should not contain multiple values or be composite in nature.

For example, let's consider a table representing employees in a company. The attribute "Name" would typically be atomic because it represents a single piece of information and cannot be further divided into smaller components within the given context. On the other hand, an attribute like "Address" might not be atomic since it can contain multiple elements such as street, city, state, and postal code.

By ensuring that attributes are atomic, it becomes easier to manipulate and query the data, maintain data consistency, and avoid data redundancy. It also helps in establishing a clear and well-defined structure for the database, making it easier to manage and analyze the data effectively.

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Answer:

ABintense pressure and breathin

Explanation:

because scientist never have the tech to go deeper

Answer:

B. Problems with breathing

C. Intense pressure

Answer: Filtration technique

Explanation:

The technique used here is called filtration.

Filtration,is a physical separation process that separates a mixture of an insoluble solid from a liquid ( acting as the solvent) by the use of a filter barrier that allows only the fluid to pass through.

In the case from the question,

As water is poured over the ground coffee, it forms a mixture of which the insoluble solid is the coffee grounds, the water is the liquid  and the filter barrier is the piece of paper  which allows only the brown  liquid coffee to pass through as the filtrate.

The order of the reactivity of the carbo cations as shown is; 2 >1 >4 > 3

We know that the order of the reactivity of the alkenes is going to so much depend on the kind of cation that is formed in the first phase of the hydration reaction.

If a stable carbocation is formed in the process then the compound that leads to such a stable carbo  cation would be much more reactive. In this case, we would now look at the order of the stability of the carbo cations formed by the species so as to have an idea of the ease of reaction of the alkenes.

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is the lightest essential particle that makes up an atom and has the least possible charge in terms of negative electricity.

is a subatomic particle with a positive electrical charge that, together with neutrons, forms the nucleus of atoms.

is a massive particle with no electrical charge. It is a baryon made up of two down quarks and one up quark.

Answer:

true

Explanation:

its A

The above statement is considered to be correct and true.

The Occupational Safety and Health Administration (OSHA) is a federal agency that is saddled with the responsibility of assuring and ensuring a safe and healthy working conditions for an employee or group of employees by doing the following;

According to the Occupational Safety and Health Administration (OSHA), trainings on the adoption and application of safety precautions (tools) such as wearing a personal protective equipment (PPE); face masks (respirators), ear plugs, safety boots, gloves, helmet, etc., are very important and are essentially to be used by all employees (workers) while working in hazard prone environments or industries.  

However, when an employee fails to strictly adhere to the recommended OSHA safety precautions, he or she is more likely to sustain a work-related accident or injury from a fall. Thus, this would negatively affect (impact) the employee because it results in him or her being absent from work (time off) and requires some costs to pay for medicals (medical cost).

In conclusion, injuries from work related falls can affect employees by resulting in time off and medical cost.

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Dissolving 640 g of sucrose in 20g of water (h2O) at 70°C will give us a saturated solution.

We know that at t degree Celcius the solubility of a solute in a solvent

=( weight of solute(g)/ weight of solvent(g)) * 100

Given at 70° C solubility of sucrose in h2o is 320g/100 g of h2o

Let x be the amount of sucrose that must dissolve in 200g of water at 70°C to give a saturated solution.

∴x = 320 * 200/100

⇒x = 640 g

∴ 640 g of sucrose dissolved in 200 gm of h2O at 70°C will give us a saturated solution.

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Answer:

my best guess is b

Explanation:

typically the lower the pitch the longer the wave line inbetween the inclines are

Answer:

The correct answer is (b)

Explanation:

Has a slippery feel.Vinegar is an aqueous solution of acetic acid, and it has a number of properties that make it useful in a variety of applications. Some of these properties include:(a) Dissolves in water to give an aqueous solution of acetic acid (H*): Vinegar is composed of water and acetic acid, and it can be dissolved in water to form an aqueous solution.(c) Turns litmus from blue to red: Litmus is a type of dye that is used as an indicator in chemical reactions. It turns blue in the presence of an alkaline solution and red in the presence of an acidic solution. When vinegar is added to litmus, it will turn the litmus red, indicating that it is an acidic solution.(d) Reacts with zinc to give hydrogen gas: When vinegar is mixed with zinc, it can produce hydrogen gas. This reaction is an example of a redox reaction, in which the vinegar is reduced (gains electrons) and the zinc is oxidized (loses electrons).However, vinegar does not have a slippery feel, so (b) Has a slippery feel is not a property of vinegar.

The fraction of tetrahedral interstitial sites occupied by carbon atoms in the iron-carbon alloy, we can use the weight percent (wt%) of carbon provided.

First, let's assume we have 100 grams of the alloy. Since it contains 0.2 wt% carbon, we have 0.2 grams of carbon.
Next, we need to calculate the molar mass of carbon, which is 12.01 g/mol. Dividing the mass of carbon (0.2 g) by its molar mass (12.01 g/mol) gives us the number of moles of carbon present.

Now, we need to calculate the number of tetrahedral interstitial sites. In a crystal lattice structure, there are 4 interstitial sites per atom. Therefore, the number of tetrahedral interstitial sites is 4 times the number of iron atoms in the alloy.
To find the number of carbon atoms, we multiply the number of moles of carbon by Avogadro's number (6.022 x 10^23 atoms/mol).
Finally, to determine the fraction of occupied sites, we divide the number of carbon atoms by the number of tetrahedral interstitial sites.

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The buffers with 0.3 M CH3COONa will be the most effective towards additions of a base, as it has the smallest change in pH upon the addition of a base.

The buffer containing the most CH3COO-, the conjugate base, will be the most efficient. This is due to the fact that the buffer capacity is dependent on the conjugate acid and base concentration, with larger concentrations resulting in a more effective buffer.

We must calculate the pH of the buffer solution at each of the specified concentrations and select the one with the smallest change in pH upon the addition of a base in order to identify the concentration of sodium acetate that is the most effective.

Using the Henderson-Hasselbalch equation:

pH = pKa + log([CH3COO-]/[CH3COOH])

where the pKa of CH3COOH is 4.76.

At 0.3 M CH3COONa: pH = 4.76 + log(0.3/0.10) = 4.96

At 2.5 M CH3COONa: pH = 4.76 + log(2.5/0.10) = 5.36

At 2.0 M CH3COONa: pH = 4.76 + log(2.0/0.10) = 5.26

At 1.5 M CH3COONa: pH = 4.76 + log(1.5/0.10) = 5.16

At 3.0 M CH3COONa: pH = 4.76 + log(3.0/0.10) = 5.46

Therefore, the buffer with 0.3 M CH3COONa will be the most effective towards additions of a base, as it has the smallest change in pH upon the addition of a base.

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1. The correct answer is basic. Barium cyanide, Ba(CN)2, is an ionic compound composed of a barium cation and a cyanide anion.

When it is dissolved in water, it will dissociate into barium cations and cyanide anions. The barium cation has a +2 charge, so it will accept two hydrogen ions from the water, forming the barium hydroxide ion, Ba(OH)2, making the barium cation basic in nature.

2. The correct answer is acidic. Barium cyanide, Ba(CN)2, is an ionic compound composed of a barium cation and a cyanide anion.

When it is dissolved in water, it will dissociate into barium cations and cyanide anions. The cyanide anion has a -1 charge, and will donate a single hydrogen ion to the water, forming the hydronium ion, H3O+, making the cyanide anion acidic in nature.

3. The correct answer is neutral. An aqueous solution of barium cyanide, Ba(CN)2, will be neutral. When the compound is dissolved in water, it will dissociate into barium cations and cyanide anions.

The barium cation will accept two hydrogen ions from the water, forming the barium hydroxide ion, Ba(OH)2, and the cyanide anion will donate one hydrogen ion to the water, forming the hydronium ion, H3O+. These two processes will cancel each other out, resulting in a neutral solution.

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The reverse reaction will be favored, and the reaction will shift in the direction of the reactants. In summary, an increase in pressure will shift the equilibrium position to the left side.

The equilibrium between AgH2C3O2(aq) and Ag+(aq)+H2C3O2-(aq) will shift towards the side with fewer moles of gas when the pressure is increased. An increase in pressure would cause the equilibrium position to shift in such a way as to reduce the total number of gas molecules involved in the reaction. In this case, the reaction only involves one mole of gas, which is AgH2C3O2(aq). Therefore, an increase in pressure will shift the equilibrium position towards the side with fewer moles of gas. In this reaction, both Ag+(aq) and H2C3O2-(aq) do not exist as gases, so they have zero moles of gas.

Therefore, the equilibrium position will shift towards the left, towards AgH2C3O2(aq), if the pressure is increased. This shift will also result in an increase in the concentration of AgH2C3O2(aq).As a result, the reverse reaction will be favored, and the reaction will shift in the direction of the reactants. In summary, an increase in pressure will shift the equilibrium position to the left side.

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The words "particle," "water," and "ice" are all parts of a composite made of hydrogen and oxygen.

A particle that serves as the nucleus for the creation of an ice crystal in the atmosphere is known as an ice nucleus, also known as an ice nucleating particle (INP).

The way that water molecules behave depends on whether energy is being absorbed or released. As the thermal energy of water particles decreases, activities like condensation, deposition, and freezing take place. When solid ice gains heat, it changes state from solid ice to liquid water in a process called melting.

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The molar concentration of chloride ions in a 2.6 M solution of MgCl₂ can be calculated using the molar ratio of chloride ions to MgCl₂.

To find the molar concentration of chloride ions, we need to consider the molar ratio of chloride ions to MgCl₂ in the solution. MgCl₂ dissociates in water to form one Mg²⁺ ion and two Cl⁻ ions. This means that for every one mole of MgCl₂, we have two moles of chloride ions.

Given that the solution is 2.6 M, it means that there are 2.6 moles of MgCl₂ per liter of solution. Since the molar ratio of chloride ions to MgCl₂ is 2:1, we can multiply the molar concentration of MgCl₂ by the ratio to find the molar concentration of chloride ions.

Molar concentration of chloride ions = 2.6 M MgCl₂ × 2 = 5.2 M Cl⁻

Therefore, the molar concentration of chloride ions in the solution is 5.2 M.

It's important to note that the density of the solution is not directly used in this calculation, as the molar concentration is determined by the number of moles of solute (MgCl₂) in a given volume of solution, rather than its mass.

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Answer:

The answer would be topaz

Answer:

Two elements

Hydrogen and Oxygen

One example of particles that can be drawn closer to occupy a smaller volume is a gas.

In the gaseous state, particles have high kinetic energy and are not strongly attracted to each other. They move freely and randomly, colliding with each other and the container walls.

Since there are minimal intermolecular forces holding them together, gas particles can be compressed or drawn closer together by reducing the volume of the container.

By decreasing the volume of a gas, such as by compressing it in a cylinder or container, the particles have less space to move around. They collide with each other more frequently, increasing the frequency of intermolecular collisions. As a result, the gas particles are drawn closer together, and the overall volume occupied by the gas decreases.

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The purpose of having one balloon larger in size than the other balloons is to show the effect of increasing the size of the balloon on the motion produced by the balloon. The size of the balloon affects the amount of air that can be stored inside it.

As a result, the amount of air that can be expelled out of the balloon with each burst increases as the size of the balloon increases. When the balloons are released simultaneously, the smaller balloons will move faster than the larger balloon. The reason behind this is due to the mass of the balloons. The larger balloon has more mass than the smaller balloons.

As a result, the larger balloon will require more force to move in the same distance as the smaller balloons. Because the amount of air expelled from the balloon is equal to the force, the larger balloon will take longer to move the same distance as the smaller balloons.

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This redox reaction involves the reduction of chromium (III) hydroxide to chromium (IV) oxide, and the oxidation of chlorine gas to chloride ions. The reaction is exothermic and releases energy, which can be harnessed by a galvanic cell, 3Cl2(g) + 2CrOH3(s) + 10OH−(aq) → 6Cl−(aq) + 2CrO−24(aq) + 8H2O(l).

In a galvanic cell, the energy released by the redox reaction is used to generate an electrical current. The reaction takes place in two half-cells, separated by a salt bridge or porous membrane. In one half-cell, the oxidation reaction occurs and electrons are released. In the other half-cell, the reduction reaction occurs and electrons are gained. The electrons flow through an external circuit, generating an electrical current.

The specific design of the galvanic cell will depend on the specific redox reaction being used. However, in general, the cell will consist of two electrodes (one for each half-cell), connected by a wire. Each electrode will be immersed in a solution containing the reactants for the corresponding half-reaction. The salt bridge or porous membrane will allow ions to flow between the two half-cells, completing the circuit. The cell potential (voltage) can be calculated using the Nernst equation.

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Answer:

what?

Explanation:

what the hell?