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Cold air falls because it is _________ ___________.

Answer:

  2AlBr₃  +  3K₂SO₄ →   6KBr  +  Al₂(SO₄)₃

Explanation:

Given species;

  Reactants

    Aluminum bromide  = AlBr₃

    Potassium sulfate = K₂SO₄

Products

    Potassium bromide  = KBr

    Aluminum sulfate = Al₂(SO₄)₃

 So, the reaction equation is given as:

          AlBr₃  +  K₂SO₄ →   KBr  + Al₂(SO₄)₃

To balance this chemical equation, let us an algebraic approach;

        aAlBr₃  +  bK₂SO₄ →   cKBr  +  dAl₂(SO₄)₃

Conserving Al;

        a  = 2d

   Conserving Br;

        3a  = c

   Conserving K;

       2b  = c

     Conserving S;

       b  = 3d

     Conserving O;

      4b  = 12d

    if a  = 1;

        c = 3

       b = \(\frac{3}{2}\)

        d  = \(\frac{1}{2}\)  

 Now, multiply through by 2;

  a  = 2, b  = 3, c = 6 and d = 1

      2AlBr₃  +  3K₂SO₄ →   6KBr  +  Al₂(SO₄)₃

Answer;

Explanations:

The electron configuration of magnesium is shown by stating that there are 12 electrons in the first shell, 8 electrons in the second level, and 2 more electrons in the third level.

The atom contains electrons, which are negatively charged particles. The electrons in the atom revolve around the nucleus, which also contains protons and neutrons.

When there are electrons in an atom's orbital, it is said to have an electron arrangement. Electrons can also be found in the atom's various cells.

Since magnesium will occupy the first shell, there will be 12 electrons in Mg. It is still necessary to insert 12-2=10 electrons. The final two electrons and eight remaining electrons will both be in the n=2 level.

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Answer:

NaNO3 - soluble in water

NH4Br - soluble in water

BaSO4 - insoluble in water

Answer: A

Explanation:

The -ane suffix implies that the compound has only single bonds for carbon-carbon bonds. The but- prefix implies that the compound consists of four carbons. Since 4 bonds are required for each carbon, there will be a total of 10 hydrogen atoms: 3 on each carbon at the end of the chain and 2 for each carbon in the middle of the chain. Thus, butane is A.

The largest effect on the population of trout in Wisconsin was caused by the introduction of non-native species into the ecosystem.

The introduction of non-native species into an ecosystem can cause a disruption in the food chain, leading to a decrease in the population of native species. In Wisconsin, the introduction of non-native species such as the brown trout and rainbow trout has had a significant impact on the population of native brook trout.

The non-native species compete with the native brook trout for food and habitat, which has led to a decrease in the brook trout population. This highlights the importance of preserving the natural balance of ecosystems and avoiding the introduction of non-native species.

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The electrification reaction is reversible. The formation of the ester represents a condensation, but the reverse reaction represents the hydrolysis of the ester.

that's all I got

good luck:)

Answer:

appearance

( C)

hope you like?!!

Answer: C, appearance

Explanation: Gradpoint

T=41+273=314 k

M=(12)+(16×2)=44g/mol

d=PM/RT

d=685×44/0.0821×314

d=1169.15 g/L

Answer:

Reactants: K = 2, S = 1, Co = 1, Cl = 2; Products: K = 2, S = 1, Co = 1, Cl = 2

Explanation:

The reaction is a double replacement reaction so the anions (Cl⁻ and S²⁻) switch places.

1 K₂S + 1 CoCl₂ ⇒ 2 KCl +  1 CoS (balanced chemical equation)

On the reactants and products side, K = 2, S = 1, Co = 1, and Cl = 2.

Hope that helps.

Both ionization energy and electron affinity are opposite processes to each other because of their functions.

The main difference between electron affinity and ionization energy is that electron affinity refers to the amount of energy released when an atom gains an electron while on the other hand, ionization energy is the amount of energy required to remove an outermost electron from an atom.

So we can conclude that both ionization energy and electron affinity are opposite processes to each other because of their functions.

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KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

KHPo4 is not considered an effective buffer compared to KH2PO4 due to its limited buffering capacity. The effectiveness of a buffer is determined by the concentration and dissociation properties of its conjugate acid-base pair.

KH2PO4 is a salt composed of the weak acid H2PO4- and its conjugate base HPO4^2-. In an aqueous solution, KH2PO4 can dissociate to release H+ ions from the H2PO4- component, which acts as a weak acid, and the HPO4^2- component can accept H+ ions, acting as a weak base. This allows KH2PO4 to effectively resist changes in pH when small amounts of acid or base are added to the solution.

On the other hand, KHPo4 consists of the strong acid H3PO4 and the weak base HPO4^2-. H3PO4 fully dissociates in water, providing a large concentration of H+ ions, making it difficult for the HPO4^2- to effectively act as a base and maintain pH stability.

Therefore, KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

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Answer:

0.600 g/cm³

Explanation:

Step 1: Given data

Step 2: Calculate the volume of the cylinder

First, we have to determine the radius, which is half of the diameter.

r = d/2 = 2.34 cm/2 = 1.17 cm

Then, we use the formula for the volume of the cylinder.

V= π × r² × h

V= π × (1.17 cm)² × 6.62 cm

V = 28.5 cm³

Step 3: Calculate the density (ρ) of the sample

The density is equal to the mass divided by the volume.

ρ = m/V

ρ = 17.1 g/28.5 cm³

ρ = 0.600 g/cm³

The total energy released per gram of methane in the experiment is 119941.33 J/g

Change in temperature (ΔT) = T₂ – T₁

Change in temperature (ΔT) = 68 – 25

Change in temperature (ΔT) = 43 °C

The absorbed by the water can be obtained as illustrated below:

Q = MCΔT

Q = 500 × 4.184 × 43

Q = 89956 J

Heat absorbed by water = 30% of heat released by methane

89956 = 30% × heat released by methane

89956 = 0.3 × heat released by methane

Divide both sides by 0.3

Heat released by methane = 89956 / 0.3

Heat released by methane = 299853.33 J

Q = m × ΔH

Divide both sides by m

ΔH = Q / m

ΔH = 299853.33 / 2.5

ΔH =119941.33 J/g

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Answer:

8

Explanation:

\(p = 10 \frac{a - b}{(c + t)} \)

Vapor Pressure of Water calculator Formula:

\(p = 10 \frac{a - b}{(c + t)} \)

Answer:

40 grams.

Explanation:

If 20 grams of C is formed from the combination or reaction of A and B chemicals in 10 minutes, 40 grams of C is formed in 20 minutes because the time is doubled so the concentration of C chemical is also doubled. If the time  is increased further, more concentration of C chemical is produced until the amount of chemicals A and B are present. If we put an enzyme in the solution, the time of the reaction can be reduced.

The R/S isomer is decided on the basis of the attached group atomic number to chiral atom.

the R/S configuration is the nomenclature used to describe the enantiomer of chiral molecules. The absolute configuration of chiral substances is another name for this arrangement. the atom attached to the chiral centre is marked based on atomic number. Higher atomic number objects will be given lesser numbers. Place the chiral centre so that the atom with the lowest priority is pointed away from the observer. The absolute configuration is R if the arrow moves in a clockwise direction. Additionally, the absolute configuration is S if the arrow is moving anticlockwise. This is followed when the lower priority group are present in a vertical position and reversed is followed in case of the horizontal direction.

Hence, absolute configuration directly influenced by priority group

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The connected group atomic number to the chiral atom determines the R/S isomer.

The enantiomer of chiral compounds is designated by the nomenclature R/S configuration. Another name for this configuration is the absolute configuration of chiral compounds. Based on its atomic number, the atom that is joined to the chiral center is identified. Lesser numbers will be assigned to items with higher atomic numbers. Put the chiral center in such a way that the atom with the lowest priority faces the viewer. If the arrow turns clockwise, the absolute configuration is R. Additionally, if the arrow is travelling counterclockwise, the absolute configuration is S. When the lower priority group is present and is positioned vertically, this happens.

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Answer: I can’t help u with this... try therapy

Explanation:

A recreational slide that has water running down it to lessen friction, sometimes requiring the user to sit on a mat or raft, and occasionally ending in a pool.

In Faribault, Minnesota, lived Herbert Sellner. His career as a designer began with the creation of furniture, followed by the design of children's toys and, most notably, the Water-Toboggan Slide. The slide, constructed in 1923, was a wooden sled that guests could sit on and ride down an incline into a lake.

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The following statements about the ionization of the side chain of glutamine in water is true are Glutamine has a positively charged form with a pK, around 10, Glutamine is usually deprotonated but will gain a proton at low pH, Glutamine is usually protonated but will lose a proton at high pH.

Glutamine is an amino acid that is considered to be a critical nutrient for cell growth and division, as well as protein synthesis. It is an amino acid that is commonly found in proteins, which are essential components of the human body. Glutamine is an amino acid that contains an amide group and an acidic side chain, making it a polar and hydrophilic amino acid. It has a chemical formula of \(C_{5}H_{10}N_{2}O_{3}\).

Ionization is the process of removing or adding one or more electrons from an atom or molecule, giving it a net electrical charge. When an atom loses one or more electrons, it becomes positively charged, whereas when it gains one or more electrons, it becomes negatively charged.

The pH is a measure of acidity or basicity in a solution, with a scale ranging from 0 to 14. A pH of 7 is considered neutral, while anything below 7 is acidic and anything above 7 is basic. The term "pH" refers to "power of hydrogen." It represents the concentration of hydrogen ions in a solution. The lower the pH, the higher the concentration of hydrogen ions, and the higher the acidity.

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The molar mass of MgCrO4 is approximately 140.30 g/mol.

To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.

The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).

The atomic masses of the elements can be found on the periodic table:

Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.

Chromium (Cr) has an atomic mass of around 51.99 g/mol.

Oxygen (O) has an atomic mass of about 16.00 g/mol.

Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:

Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)

Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)

Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol

Molar mass ≈ 140.30 g/mol

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a)possesses a negative charge - electron

b)has no charge - neutron

c)has a mass slightly less than that of a neutron - proton

d)has a charge equal to, but opposite in sign from, that of an electron - proton.

What has a negative charge?

Electrons have a negative charge. The charge on the proton and electron are exactly the same size but opposite. Neutrons have no charge. Since opposite charges attract, protons and electrons attract each other.

What are the four properties of neutrons?

Neutrons are neutral particles – with no net electric charge.

Neutrons have a non-zero magnetic moment.

Free neutrons (outside a nucleus) are unstable and decay via beta decay.

Is a neutron's mass slightly less than a proton's?

The mass of a neutron is slightly greater than the mass of a proton, which is 1 atomic mass unit (AMU).

Is the charge of an electron opposite to the charge of a proton?

Electrons and protons have equal and opposite charges. The magnitude of this charge is 1.6×10−19 Coulomb.

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Answer:

Energy added to solid water will turn it into liquid water; add energy into liquid water and it will be turned into water vapor.

Explanation:

Adding energy is basically adding heat; the more heat, the more excited the molecules of H2O gets. In solid water, the molecules aren't really moving because they don't have a lot of energy, so it is solid. In liquid water (which is water in room temperature), it has a medium amount of energy; the molecules aren't stuck together but it isn't completely dispersed, so it is in liquid form. However, in water vapor, the energy becomes very high and the molecules are excited. The hydrogen bonds holding the molecules together break and the water is released as a vapor.

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

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The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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4s2, 4p5 electronic configuration would belong to the element with the most negative electron affinity i.e. halogens.

A specific amount of energy is released when one more electron is added to a neutral atom to produce a negatively charged ion. In chemistry, this is referred to as electron affinity. Due to the difficulty of determining the affinities of an atom's electrons, values for only a small subset of chemical elements, particularly the halogens, are known. These figures were calculated from observations of the elemental ionic compound lattice energies and formation energies. The electron affinity of an element is a measure of how well it can act as an electron acceptor (an oxidizing agent), and it is often connected with the kind of chemical bonds the element forms with other elements. Naturally occurring chemical processes frequently result in electrical energy, and some of these processes are employed in batteries and fuel cells to generate electricity. On the other hand, a number of chemical processes that do not happen naturally can be created using electric current. Electrical energy is directly transformed into chemical energy during the electrolysis process.

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