Which metal will spontaneously react with Zn²⁺(aq), but will not
spontaneously react with Mg²⁺ (aq)?

A contraption that swiftly prepares food is run by infrared rays. Microwaves employ infrared rays to heat meals by warming any water that may be present.

Numerous food production processes, including drying, boiling, heating, peeling, polyphenol recovery, freeze-drying, antioxidant recovery, microbiological inhibition, sterilizing grains, baking bread, roasting food, making juices, and cooking food, all use infrared technology.

Infrared radiation has the ability to ease or release muscle tension and encourage local blood circulation in the body. Infrared radiation has been used in conventional and modern medicine to treat conditions including autoimmune diseases and issues with wound healing in addition to relieving muscle pain and tension.

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Answer:

1048 mL

Explanation:

Step 1: Given data

Step 2: Calculate the moles corresponding to 20.00 g of KCl

The molar mass of KCl is 74.55 g/mol.

20.00 g × 1 mol/74.55 g = 0.2683 mol

Step 3: Calculate the volume of the solution

Molarity is equal to moles of solute divided by liters of solution.

M = moles of solute / volume of solution

volume of solution = moles of solute / M

volume of solution = 0.2683 mol / (0.2560 mol/L)

volume of solution = 1.048 L = 1048 mL

Answer:

Snow comprises individual ice crystals that grow while suspended in the atmosphere—usually within clouds—and then fall, accumulating on the ground where they undergo further changes. It consists of frozen crystalline water throughout its life cycle, starting when, under suitable conditions, the ice crystals form in the atmosphere, increase to millimeter size, precipitate and accumulate on surfaces, then metamorphose in place.

Explanation:

hope this helps

Answer:

b. 186 g

Explanation:

Step 1: Write the balanced equation.

4 NH₃(g) + 6 NO(g) → 5 N₂(g) + 6 H₂O(l)

Step 2: Calculate the moles corresponding to 145 g of N₂

The molar mass of nitrogen is 28.01 g/mol.

\(145g \times \frac{1mol}{28.01 g} =5.18 mol\)

Step 3: Calculate the moles of NO required to produce 5.18 moles of N₂

The molar ratio of NO to N₂ is 6:5.

\(5.18molN_2 \times \frac{6molNO}{5molN_2} = 6.22molNO\)

Step 4: Calculate the mass corresponding to 6.22 moles of NO

The molar mass of NO is 30.01 g/mol.

\(6.22mol \times \frac{30.01g}{mol} =186 g\)

The mass of NO required to produce 145 g of N₂ is 186 g.

The correct answer to the question is Option B. 186 g

We'll begin by calculating the mass of NO that reacted and the mass of N₂ produced from the balanced equation.

4NH₃ + 6NO —> 5N₂ + 6H₂O

Molar mass of NO = 14 + 16 = 30 g/mol

Mass of NO from the balanced equation = 6 × 30 = 180 g

Molar mass of N₂ = 14 × 2 = 28 g/mol

Mass of N₂ from the balanced equation = 5 × 28 = 140 g

From the balanced equation above,

140 g of N₂ were produce by 180 g of NO

Finally, we shall determine the mass of NO required to produce 145 g of N₂

From the balanced equation above,

140 g of N₂ were produce by 180 g of NO

Therefore,

145 g of N₂ will be produce by = (145 × 180) / 140 = 186 g of NO

Thus, 186 g of NO is required for the reaction.

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Answer:

Thx

Explanation:

The oxidation number of Ag in Ag2O is +1.

In Ag2O, there are two silver atoms (Ag) and one oxygen atom (O). Oxygen is known to have an oxidation number of -2 in most compounds. Since the compound is neutral, the sum of the oxidation numbers of all the atoms must equal zero.

Therefore, the oxidation numbers of the two silver atoms must add up to +2 to balance out the -2 oxidation number of the oxygen atom. Since there are two silver atoms, each silver atom must have an oxidation number of +1 to yield a total oxidation number of +2 for the compound.

In Ag2O, the silver atoms lose one electron each to form Ag+ ions. This results in an oxidation number of +1 for each silver atom. The oxygen atom gains two electrons from the silver atoms to achieve a stable octet configuration, resulting in an oxidation number of -2 for the oxygen atom. The compound Ag2O is formed through the transfer of electrons, with each silver atom exhibiting an oxidation number of +1.

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The reaction is second order with a rate constant of 0.043 mol/l min.

For CA = 0.1 mol/l, -rA = 0.1 mol/l min

For CA = 0.2 mol/l, -rA = 0.3 mol/l min

For CA = 0.3 mol/l, -rA = 0.5 mol/l min

For CA = 0.4 mol/l, -rA = 0.6 mol/l min

The slope of this line is equal to the order of the reaction (n), and the y-intercept is ln(k).

Slope = (0.6931 - (-2.3026)) / (0.3010 - (-0.9163)) = 1.929

ln(k) = -2.3026 + 1.929 * (-0.3010)

ln(k) = -3.1504

k = e^(-3.1504) = 0.043 mol/l min

The reaction is second order with a rate constant of 0.043 mol/l min.

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Avogadro's number is used to determine the small entity like the atoms and the molecules. 5.5 moles of magnesium hydroxide contain 3.31 × 10²⁴ molecules.

Molecules are the small entity that makes up the compound. It is made up of similar or different atoms.

If 1 mole of magnesium hydroxide = 6.02 ×10²³ molecules

Then 5.5 moles = 33.11 × 10²³ molecules.

Therefore, 3.31 × 10²⁴ molecules of magnesium hydroxide are present in 5.5 moles.

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Considering the definition of compound, chemical formula and Avogadro's Number, there are 4.8184×10²⁴ atoms of O in 2 moles of H₃PO₄.

In a compound there are atoms of different elements joined by forces that we call chemical bonds.

The chemical formula indicates the number and type of different atoms present in the molecule.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

In this case, in 1 mole of the compound H₃PO₄ you have:

Then, in 2 moles of H₃PO₄ you have 8 moles of O.

Now, you can apply the following rule of three: if by definition of Avogadro's number 1 mole of oxygen contains 6.023×10²³ atoms, 8 moles of oxygen contains how many oxygen atoms?

\(number of atoms=\frac{8 molesx6.023x10^{23}atoms }{1 mole}\)

number of atoms= 4.8184×10²⁴ atoms

Finally, there are 4.8184×10²⁴ atoms of O in 2 moles of H₃PO₄.

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The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

The Chemical Abstract Service registry number (CAS number) is unique.

What is meant by  Chemical?

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Answer:

Creo que es D pero no tan segura

Explanation:

Answer:

A. Decrease in temperature

Explanation:

The statement indicates an endothermic chemical reaction is "Decrease in temperature".

Endothermic reactions generate products by absorbing heat energy from the environment.

The temperature of the reaction mixture rises as energy is released in an exothermic process. The temperature drops when energy is absorbed in an endothermic reaction. A thermometer can be used to monitor temperature changes in the reaction mixture.

An endothermic reaction happens when the temperature of an isolated system drops while the temperature of its surroundings rises. The overall heat of reaction in endothermic reactions is positive (q > 0).

Hence the correct option is A.

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The dissociation of cadmium chloride is as follows: CdCl₂(s) → Cd⁺²(aq) + 2Cl⁻(aq)

Dissociation is the process by which a compound body breaks up into simpler constituents; said particularly of the action of heat on gaseous or volatile substances.

It is a chemical reaction in which a compound breaks apart into two or more components. The general formula for a dissociation reaction follows the form:

AB → A + B

According to this question, cadmium chloride undergoes dissociation into cadmium and chlorine ions as follows:

CdCl₂(s) → Cd⁺²(aq) + 2Cl⁻(aq)

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Answer:

See explanation

Explanation:

Fe(H20)6]2+ is a high spin octahedral complex because water is weak field ligand. A high spin complex has a maximum number of unpaired d electrons.

The spin state of Fe(H20)6]2+ is S=2. The final electron goes into an eg orbital. If the metal is oxidized to Fe^3+, the bond lengths decreases. For an oxidation of M2+ complex to M3+, the M3+L bonds will be shorter due to the higher charge density on the metal. Since the occupation of the eg orbitals in both complexes is the same it then follows that that the difference in the bond lengths must be due to the charge alone.

Answer:

Negatively charged

Explanation:

It could be an ion too. To balance the electron shell it could lose 1 or 2 electrons. If it is not an ion it won't lose atoms to balance the shells.

Answer:

The first one

Explanation:

Both the products and reactants in the first equation have the same number of moles and will not be affected by a change in volume.

Answer:

3 Ca(OH)2 + 2 K3PO4 ---> Ca3(PO4)2 + 6 KOH

Explanation:

Just balance each atom on both sides.

Answer:

17 reactions

Explanation:

Answer:

The mass of ammonium sulfate would be 8.86 x 1024 grams.

Explanation:

Ammonium sulfate is composed of four atoms of oxygen (O) and two atoms of nitrogen (N). Therefore, 4.43 x 1024 oxygen atoms would require 8.86 x 1024 grams of ammonium sulfate.

Ammonium sulfate is an inorganic compound composed of two nitrogen atoms (N) and four oxygen atoms (O). The molecular formula for ammonium sulfate is (NH4)2SO4.

This means that for every two nitrogen atoms, there are four oxygen atoms. Therefore, for 4.43 x 1024 oxygen atoms, there would be 8.86 x 1024 grams of ammonium sulfate required.

Answer:

one to two inches (three to five centimeters) per year.

Explanation:

Answer:

1 to 2 inches (3 to 5 centimeters) per year

Explanation:

It depends on what plates your talking about, but in general, they move apart anywhere from 1 to 2 inches (3 to 5 centimeters) per year.

Specifically, though, The Arctic Ridge has the slowest rate (less than 2.5 cm/yr), and the East Pacific Rise near Easter Island, in the South Pacific about 3,400 km west of Chile, has the fastest rate (more than 15 cm/yr).

Answer:

D.

Explanation:

Because if an object is more dense than water it will sink.

The "Ring of Responsibility" requires a 15- to 25-foot untreated buffer zone next to water bodies.

A buffer zone is an area of land that separates two or more countries, states, or territories, and is often demilitarized. The purpose of a buffer zone is to provide a space for negotiations and to reduce the possibility of conflict and war. Buffer zones can also be used to protect sensitive natural resources or habitats, such as areas of wilderness or wildlife. Buffer zones can be permanent or temporary, and can range in size from a few miles to hundreds of miles. In addition to physical barriers, buffer zones can also include economic, political, and social measures to reduce tensions between two or more parties. Buffer zones are an important tool in international relations, as they can help to prevent armed conflict and promote peaceful resolution of disputes.

This buffer zone is intended to prevent pollutants from entering the water body and protect it from potential environmental damage.

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The rate of reaction increases when the temperature increases because the reactant particles collide more often and the correct option is option C.

The rate of reaction refers to the speed at which the products are formed from the reactants in a chemical reaction. It gives some insight into the time frame under which a reaction can be completed.

The rate or speed of reaction can be defined as the change in the concentration of any one of the reactants or products per unit time.

The rate is higher at higher temperatures because colliding particles will have the required activation energy at high temperature and more successful collisions will take place.

Therefore, The rate of reaction increases when the temperature increases because the reactant particles collide more often and the correct option is option C.

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Answer:

The desert should be divided into different types based on its properties. The organisms living in specific type of desert should be named accordingly.

Explanation:

There are usually five major types of desert in the world. Tropical, rainy, semi arid desert, coastal desert and dry desert. There are many different types of organisms living in these deserts. The biodiversity has made it difficult for the humans to analyse and identify the millions of different types. The best way is to organize and name the organisms that live in specific types of deserts.

Answer:

The answer to your question is ⇔ arctic air mass

Explanation:

I hope this helps and have a wonderful day!