what are the charge and coordination number of the central transition metal ion(s) in each compound below? charge: coordination number: k[pt(nh3)cl5]

Answer:

3

Explanation:

A nitrogen atom must gain three electrons to have the same number of electrons as an atom of the following noble gas, neon. Thus, a nitrogen atom will form an anion with three more electrons than protons and a charge of 3−

Water (H2O) is a liquid at room temperature while carbon dioxide (CO2) and methane (CH4) are gasses at room temperature because hydrogen bonds are stronger than dispersion forces, water is a liquid as particles are held close to each other.

The term dispersion forces are defined as temporary attractive force that results when the electrons in two adjacent atoms contain positions that make the atoms form temporary dipoles.

In case of water and carbon dioxide, water has stronger intermolecular bonds (hydrogen bonds) than carbon dioxide (London dispersion forces).

Because hydrogen bonds are stronger than dispersion forces, water is a liquid as particles are hold close to each other, and methane is a gas.

Thus, hydrogen bonds are stronger than dispersion forces, water is a liquid as particles are held close to each other.

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There are 1.57 * 10^23 ions in the compound calcium nitrate.

We know that ions are species that are positively or negatively charged. We have to note that when we have the compound in this case calcium nitrate, we have to look up the number of ions that we have in it.

Calcium nitrate has one nitrate ion and two calcium ions which makes a total of three ions in the compound. We would then have;

Number of moles = mass/molar mass

= 14.3 g/164 g/mol

= 0.087 moles

Then the number of ions is;

3 *  0.087  * 6.02 * 10^23

=1.57 * 10^23 ions

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Calcium nitrate is composed of one calcium ion (Ca2+) and two nitrate ions (NO3-). 14.3g of calcium nitrate produces 3 ions.

To determine how many ions are produced from a 14.3 g sample of calcium nitrate, we need to know the molar mass of the compound and use the molar mass to convert the given mass of 14.3 g to moles.

The molar mass of calcium nitrate is 164.09 g/mol. To convert 14.3 g of calcium nitrate to moles, we divide the mass by the molar mass:

moles = 14.3 g / 164.09 g/mol = 0.087 mol

Since calcium nitrate is composed of one calcium ion and two nitrate ions, the number of ions produced by 0.087 moles of calcium nitrate is:

ions = (1 Ca2+) + (2 NO3-) = 3 ions

Therefore, 0.087 mol of calcium nitrate produces 3 ions.

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The Hertzsprung-Russell diagram (HR diagram) uses two things to classify stars: their luminosity and their temperature.

Luminosity refers to the amount of energy a star emits per unit of time, while temperature refers to the surface temperature of a star, which can be determined by the star's color.

The HR diagram plots stars on a graph with luminosity on the y-axis and temperature (or color) on the x-axis. This allows scientists to study the different evolutionary stages of stars, and how their properties change over time.

The HR diagram is a powerful tool for understanding the life cycles of stars and the different types of stars that exist in the universe. It provides insight into the physical properties of stars, such as their temperatures, luminosities, and masses, and how these properties change over time.

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A lithium-oxygen ionic connection is created. Since lithium belongs to group 1A, each of its atoms possesses one valence electron. Lithium's Lewis valence electron structure is seen here.

Since oxygen belongs to group 6A, each of its atoms contains six valence electrons.

Lewis valence dot diagrams are models that only display the valence electrons, therefore it's vital to keep that in mind. In the lower energy levels, which are those closest to the nucleus, there are frequently more electrons that are not involved in bonding and are not seen on an electron dot diagram. If the atom loses all the valence electrons in that valence shell, exposing the level below it, the inner electrons can be seen.

Let's examine how to build Lewis valence electron dot structures of a single element before you begin sketching electron dot formulae of ionic compounds.

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Enthalpy is the property of the substances that can be used to obtain the heat absorbed or evolved in a chemical reaction at constant pressure.

The term Enthalpy is the heat content of a system at constant pressure. changes in enthalpy of chemical systems as reactants are converted into products. The state of reactants and products influences the enthalpy value for a system. The heat absorbed or released at a constant pressure is the same as the enthalpy change. It is given by the symbol ΔH. The change in enthalpy of the reaction is a measure of the differences in enthalpy. The enthalpy of a system is determined by the energies needed to break the chemical bonds and the energies needed to form the chemical bonds.

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The  type of attractive force that the arrow is known to be pointing at in the molecule is option D. intramolecular force

The attracting or repellent interactions between atoms within a molecule are known as intramolecular forces. These forces keep the atoms of the molecule together. They comprise covalent, ionic, and metallic chemical linkages, among others.

Therefore, These bonds develop as a result of electron sharing or transfer between atoms. These intramolecular bonds, which are the forces that hold the atoms in the molecule together, are likely indicated by the arrow in the molecule.

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Yes, Silver and oxygen do have an ionic bond.

While oxygen has six electrons in its outermost shell, silver only has one valence electron. The transfer of electrons from a metal to a non-metal results in the formation of lonic bonds. When an atom completes the octet and the outermost shell, it becomes the most stable. This occurs when the outermost shell's theirs and p subshells have all eight electrons, creating a full octet. Since silver only has one valence electron, it must give up that electron and give it to oxygen in order to become stable. Since oxygen has 6 valence electrons, it requires 2 more electrons to complete its octet in order to become stable. Since each silver atom contributes one electron and each oxygen atom requires two, an ionic bond requires two silver atoms. Ag will become cation (Ag+), and Oxygen will become an anion (O2-), forming an ionic connection as a result of the electrostatic attraction between the two oppositely charged ions in the ionic compound (Ag2O2).

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The mass of carbon dioxide can be formed from the alcoholic fermentation of 23.4 g of glucose is 4.68 g

Fermentation is the term for the process of digesting glucose when there is no oxygen present.

We must balance the compound's atoms and examine them before we can answer the question.

The glucose has the following molar mass:

C₆H₁₂O₆ = (12x6) + (1x12)+ (6x 16) = 180 g/mol

Then we can write the balance reaction

C₆H₁₂O₆(aq) ⇒ 2C₂H₅OH(l) + 2CO₂(g)

The mole ratio of glucose to ethanol after balancing the equation is 1:2.

We should find moles of glucose

moles glucose = mass/ mass molar

Moles glucose = 2.34 g/ 180 g/ mole

Moles glucose = 0.013 moles

We know that 1 moles of glucose produce 2 moles of carbon dioxide so, with unitary method we can determine the moles of carbon dioxide.

Moles of CO₂ = 2/1 x moles glucose

Moles of CO₂ = 2/1 x 0.013 moles = 0.026 moles

the we can calculate the mass of CO₂

Mass CO₂= moles x mass molar

Mass CO₂ = 0.026 moles x 180 g/ moles

Mass CO₂ = 4.68 g

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Two or more reactants unite to form a single product are combustion and synthesis.

1. Combustion: Combustion is a reaction in which two or more reactants, typically a fuel and an oxidizer, combine to form a single product: carbon dioxide and water. The heat released by combustion is often used to power engines and turbines.

2. Synthesis: Synthesis is a reaction in which two or more reactants combine to form a single product. In this reaction, one of the reactants is usually a reactant that has been broken down into its individual components, such as sugar or monomers, while the other reactant is a molecule or a group of molecules that can combine with the individual components.

What is Combustion?

Combustion is a chemical reaction involving the rapid oxidation of a fuel with an oxidant, usually oxygen, to release energy in the form of heat and light.

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The volume of a 2.1549 lb piece of ebony wood is approximately 0.879619 quart.

To find the volume of a 2.1549 lb piece of ebony wood with a density of 1.174 g/ml, we first need to convert the weight from pounds to grams. This is done by multiplying the weight in pounds by 453.59 (1 lb = 453.59 g).

2.1549 lbs * 453.59 g/lb = 981.310091 grams

Next, we can use the density formula to calculate the volume:

Volume = Mass / Density

So, Volume = 981.310091 g / 1.174 g/ml = 837.7 ml

To convert milliliter to quart we can use the conversion factor of 1 quart = 946.352946 ml

So, 837.7 ml / 946.352946 ml/quart = 0.879619 quart

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This statement is true. Crack is one of the world's most powerful natural stimulants and is converted into an easily recognizable crystalline form with the addition of ammonia and sodium bicarbonate.

Crack cocaine, commonly known simply as crack and also known as rock, is the free base form of the smokeable stimulant cocaine. The crack provides the smoker with a short, intense high. The Adolescent Substance Abuse Treatment Manual calls it the most addictive form of cocaine. Crack is made by dissolving cocaine powder in a mixture of water and ammonia or sodium bicarbonate (baking soda). You can Boil the mixture until a solid substance forms.

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The new temperature be to maintain constant pressure is 894.45 Kelvin

Volume of Neon, V1, equals 15 l; Temperature, T1, equals 25 °C; and Volume, V2, equals 45 l.

T2 new temperature to keep pressure constant

According to the Present Situation

The starting amount of neon, which is 15 litres at 25 degrees Celsius, is permitted to increase to 45 litres. In order to keep the pressure constant, we must determine the new temperature.

Charles Law is used.

V₁/T₁ = V₂/T₂

Replace with the value we obtain

15/298.15= 45/T₂

15/298.15 = 45/T₂

T₂ = 45×298.15/15

T₂ = 3×298.15

T₂ = 894.45 K

Therefore, 894.45 Kelvin is needed to maintain a constant pressure.

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When the pressure is 1 atm and the volume of an ideal gas is 22.4 L the temperature is at 273 K.

Historically, STP was defined as occurring at 0 degrees Celsius (273.15 K), and 1 atm by the International Union of Pure and Applied Chemistry (IUPAC). 0 degrees Celsius, or 32 degrees Fahrenheit or 273 Kelvin, is considered the norm. This is effectively the temperature at which pure water will freeze at sea level in air at 1 atm standard pressure. Air pressure and temperature fluctuate from location to place. A standard reference of both is necessary to test, compare, record chemical and physical processes where temperature and pressure are relevant, including data centres and other locations where computers are utilised. Changes in temperature or pressure also affect some of a substance's qualities. They consist of the following: density, viscosity, melting point and boiling point.

We know STP as a temperature of 0 °C and a pressure of 1 bar. The following equation proves that at 1 atm pressure and temperature 273 K, the volume of an ideal gas is 22.4 L.

Using the Ideal Gas Law we can calculate the molar volume of an ideal gas such that PV = nRT

Here, R=0.0821 L atm mol^-1 K^-1 ,

P=1 atm and n = 1 mole

Let us consider T = 273 K

Substituting these values in the above equation we get,

1 × V = 1 × 0.08201 × 273

V = 1 × 0.08201 × 273

V = 22.4 litre . Hence proved.

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The atom economy of reaction 2 is  57.8%.

We have to note that the atom economy would have to do with the atoms that are utilized and the atoms that are not utilized in the process. We have to consider the left and the right hand sides of the reaction.

Mass of the desired product = 63.5 + 2(35.5) = 134.5

Mass of the reactants = 2(63.5 + 16) + 2(35.5 + 1) = 159 + 73 = 232

Then atom economy = Mass of atoms in desired product/Mass of atom in reactant * 100/1

= 134/232 * 100 = 57.8%

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Answer:

ethanoic acid is weak acid

ph (4 5 6)

hydrochloric acid is strong acid

ph(1 2 3)

for acid the more higher pH,the weak acid

The kinetic theory states that the forces between molecules and the energy that they possess.

The kinetic theory of matter helps to understand why matter exist in different stages i.e., solid, liquid and gases, and how matter can convert from one stage to another.

The assumption of kinetic theory is that the measurable characteristics of gases, liquids, and solids reflect the mixed actions of countless numbers of atoms and molecules.

Thus, The kinetic theory states that the forces between molecules and the energy that they possess.

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Protons and neutrons are both subatomic particles that make up the nucleus of an atom. The main difference between the two is their electrical charge. Protons have a positive charge, while neutrons have no charge (they are neutral). The number of protons in the nucleus of an atom is called the atomic number, and this number determines the element to which the atom belongs. The number of protons and neutrons together is called the atomic mass, which determines the isotope of an element.

Another difference is the mass, protons have a slightly less mass than neutrons. Protons have a mass of about 1 atomic mass unit (amu), while neutrons have a mass of about 1.008 amu.

In terms of their behavior and interactions, protons and neutrons also have different properties. Protons, because of their positive charge, are affected by electromagnetic forces, while neutrons are affected by the strong nuclear force. Because of this, protons are more likely to interact with other particles, while neutrons tend to remain in the nucleus.

In summary, protons and neutrons are both subatomic particles that make up the nucleus of an atom. The main difference between the two is their charge, protons are positively charged while neutrons are neutral. They also have different mass and behavior due to the forces that affect them.

According to ideal gas law, there are 855685.19 moles of hydrogen in 377 moles.

The ideal gas law is a equation which is applicable in a hypothetical state of an ideal gas.It is a combination of Boyle's law, Charle's law,Avogadro's law and Gay-Lussac's law . It is given as, PV=nRT where R= gas constant whose value is 8.314.The law has several limitations.The graph of an ideal gas is a straight line passing through the origin.

Substituting the values in the equation, V=nRT/P=377×8.314×273/1=855685.19 moles.

Thus, there are 855685.19 moles of hydrogen in 377 moles.

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The electron cloud is the space surrounding the nucleus that has an overall negative charge.

In an atom, the negatively charged electrons are found in an electron cloud or electron shell, which surrounds the positively charged nucleus. This electron cloud can be thought of as a region of space in which electrons are likely to be found.

The electrons in the cloud are in constant motion and are not in specific orbits around the nucleus.



The overall charge of the electron cloud is negative because it contains negatively charged electrons. The negatively charged electrons balance out the positive charge of the nucleus.

The number of electrons in the electron cloud is equal to the number of protons in the nucleus, which means that the overall charge of the atom is neutral.

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The moles of oxygen needed to produce of water is 0.5 moles of oxygen. To calculate the moles of oxygen needed to produce a certain amount of water, we need to know the chemical equation for the combustion of octane (C8H18) with oxygen gas (O2).

The equation is: 8CO2 + 9H2O = C8H18 + 12.5O2

As we can see from the equation, for every 1 mole of octane that is burned, 12.5 moles of oxygen are needed to produce the 9 moles of water vapor. Therefore, if we want to calculate the moles of oxygen needed to produce a certain number of moles of water, we can simply divide the number of moles of water by the ratio of water to oxygen in the equation (9:12.5).

For example, if we want to know how many moles of oxygen are needed to produce 2 moles of water, we would divide 2 by the ratio of water to oxygen, which is 2/(9/12.5) = 0.5 moles of oxygen.

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The size of the atoms a and the number of holes in the atoms can be used to decode the element.

A model is a miniature depiction of reality. Molecular models often consists of boxes that contain balls which are used to represent elements. In common parlance, the color is used to show the type of element. The balls in a modeling kit representing different elements are often distinguished by color.

Apart from the color, the size of the atoms a and the number of holes in the atoms can be used to decode the element

Your question is incomplete most probably your full question was

The balls in a modeling kit representing different elements are often distinguished by color. however, there are other ways to identify the elements. beyond color, what differences do you expect between the atoms of distinct elements in a modeling kit?

select one or more:

a. the arrangement of holes in the atoms

b. the material that makes up the atoms

c. the comparative size of the atoms

d. the number of holes in the atoms

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To find the molar mass of the gas, we can use the ideal gas law: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. We are given P, V, and T and can use them to solve for n.

First, we need to convert the temperature from degrees Celsius to kelvin: 90.0 °C + 273.15 = 363.15 K

Next, we can use the molar mass formula: m = (mass of the gas) / (moles of the gas)

We can calculate the number of moles of gas using the ideal gas law:

n = (PV) / (RT)

n = (89.3 kPa * 147.2 mL) / (8.314 J/mol*K * 363.15 K)

We know that mass of the gas is 0.1665 g

Now we can use the formula to calculate molar mass:

molar mass = (0.1665 g) / n

Now we have molar mass, we can use it to find out the identity of the gas.

The molar mass for the ideal gas is 28.96 g/mol which is the molar mass of Nitrogen gas.

Therefore, the gas in the light bulb is Nitrogen.

The gas has a molar mass of 40 g/mol and the gas is Ar.

We have to use the Ideal gas equation so as to obtain the number of moles of the gas that we have in this context and then we are going to have in the case of the gas that is under study;

Pressure = 89.3 kPa or 0.88 atm

Volume =  147.2 mL or 0.1472 L

Temperature = 90 degrees + 273 = 363 K

Gas constant = 0.082 atmLK-1mol-1

Then we have;

PV = nRT

n = PV/RT

n = 0.88 atm * 0.1472 L/0.082 atmLK-1mol-1 * 363 K

n = 0.1295/29.8

n = 0.0043 moles

We then have;

Number of moles = mass/molar mass

Molar mass = Mass/Number of moles

=  0.1665g/0.0043 moles

= 40 g/mol

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The sum of the standard enthalpies of formation of the products minus the sum of the standard enthalpies of formation of the reactants.

Define molar heat?

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When water is added to anhydrous copper sulfate, two things will happen that is, Hydration and Formation of a blue color.

What is Anhydrous copper sulphate?

Anhydrous copper sulphate is a white crystalline compound used as an oxidizing agent and as a catalyst in organic chemistry. It is also used as a fungicide, herbicide, and insecticide in horticultural applications. Copper sulphate is a salt composed of copper and sulphuric acid. It is highly water-soluble and has a distinct blue-green color when dissolved in water. When anhydrous, it is a white powder. Anhydrous copper sulphate can be produced by heating the hydrated form of the salt above 250°C.

When water is added to anhydrous copper sulphate, two things will happen. Firstly, the anhydrous copper sulphate will dissolve in the water, forming a blue-colored solution. This indicates that the water is indeed present. Secondly, the anhydrous (without water) copper sulfate will absorb water and become hydrated, forming copper sulfate pentahydrate (CuSO4 * 5H2O).

Therefore, when water is added to anhydrous copper sulphate Hydration and Formation of a blue color will occur.

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If our clothing catches fire or a large number of chemicals is spilled on our clothing, the best thing to do is stop, drop, and roll.

Stop where we are, drop to the ground, and roll to put out the fire or absorb the chemical spill. You should also try to cover your face, mouth, and nose with your hands or a cloth to avoid inhaling chemicals or smoke.

If possible, we should also seek help from someone nearby who can help us with the fire or chemical spill. Make sure to call emergency services as soon as possible. If the clothing is still burning, you should take off any items of clothing that have not been burned or affected by the chemical spill, and move away from the fire or spill as quickly as possible.

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The change in size is a physical property and and the heat evolution by burning is a chemical property. Hence,  option c is correct.

Physical properties of a substance involves, change in state, size or shape. They does not involve formation of a new compound and thus does nit undergo breaking or making of chemical bonds.

A chemical change involves the breaking or making of chemical bonds results in the formation of a new product. The change in size of a material by stretching it is a physical change.

Burning a material involves breaking of bonds and the formation of ash and other side products. Hence, option c is correct. C is a chemical property and D is a physical property.

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The macromolecule that exists with a backbone where the functional groups are the amine and the carboxylic acid is a polypeptide.

The macromolecule that contains sugar, phosphate group and nitrogenous base is a nucleic acid, specifically DNA or RNA. A nitrogenous base is a nitrogen-containing compound that plays a critical role in the structure and function of nucleic acids such as DNA and RNA. As in carboxylic acid and in DNA, the nitrogenous bases are adenine (A), thymine (T), cytosine (C), and guanine (G) and they form the base pairs that hold the two strands of DNA together. Adenine pairs with thymine (A-T) while guanine pairs with cytosine (G-C). These base pairs are held together by hydrogen bonds, which are relatively weak chemical bonds, but they provide the stability that is needed for the double helix structure of DNA. In RNA, the nitrogenous bases are adenine, cytosine, guanine, and uracil (U) instead of thymine. Uracil pairs with adenine (U-A) and the other base pairs are the same as in DNA. The nitrogenous bases in RNA play a critical role in the genetic code, as the sequence of bases in the RNA molecule determines the sequence of amino acids in a protein. In addition to their role in nucleic acids, nitrogenous bases are also found in other biomolecules such as ATP, NAD and coenzyme A, which are all important for cellular metabolism.

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An element's isotopic structure and most common ionic states can be predicted using its atomic number, electron configuration, and number of protons and neutrons in its nucleus.

The number of electric charges in the nucleus of a chemical element is referred to as its atomic number.

This is the same as the number of protons found in the nucleus of each element's atom for normal atomic nuclei. Common chemical elements can be identified uniquely using atomic numbers.

The number of protons in an atom's nucleus or the number of electrons in an electrically neutral atom are the same as its atomic number. The number of protons is the atomic number.

The number of protons in a nucleus is commonly referred to as an atomic number. The element's identity is determined by the number of protons.

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Answer: The orbit of the electrons