Define the term coordinate covalent bond and give an example.

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Answer:

Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).

The name of the Group 17 elements is called halogens

The group 17 elements are very reactive elements. Members of this group include:

The group 17 element are known to produce salts as they react with metals. Hence, they are called halogens

The group 17 elements are have 7 valence electrons and they required one electron to attain the stable octet configuration of the noble gas family.

From the above, we can see that the name of group 17 elements is halogens

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The ionization values belong to the element magnesium (Mg). Ionization values help us determine the amount of energy that will be required to remove one or more electrons from an atom. The third period is where we can locate the element that has these ionization values.

These ionization values are listed in the table given below:Element: Mg (Magnesium)First ionization energy: 738 kJ/molSecond ionization energy: 1450 kJ/molThird ionization energy: 7732.7 kJ/mol

For a neutral atom, the first ionization energy (IE1) is the amount of energy required to remove an electron from the outermost shell. As we move from left to right in a period, the ionization energy increases. In the third period, Mg (magnesium) has first, second, and third ionization energies of 738 kJ/mol, 1450 kJ/mol, and 7732.7 kJ/mol, respectively. Magnesium is a chemical element that has an atomic number of 12. It has two valence electrons and is located in group 2 of the periodic table. Magnesium has a melting point of 1,202°F (650°C) and a boiling point of 1,994°F (1,090°C). It is a silver-white metal that is widely used in the manufacture of alloys and other industrial applications.

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4.37 g/cm³ is the density of rhodium in grams per cubic centimeters.

What is the atomic weight of rhodium?

The atomic weight of rhodium is 102.9 g/mol. This means that one mole of rhodium atoms has a mass of 102.9 grams. Rhodium is a rare, silvery-white metal that is highly reflective and has a high melting and boiling point. It is often used in catalytic converters, electroplating, and jewelry. The atomic weight of rhodium is an important factor in determining its physical and chemical properties.

To calculate the density of rhodium, we need to divide its atomic weight by its volume. The volume of an fcc crystal can be found by using the formula:

V = a^3/2

where a is the atomic radius. Substituting the values, we get:

V = (0.1345 nm)^3/2 = 2.36 x 10⁻²³ cm³ .

Therefore, the density of rhodium is 102.9 g/mol / 2.36 x 10⁻²³ cm³ = 4.37 g/cm³.

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Nucleic acids are made up of smaller subunits called nucleotides

Nucleotides, which are smaller components, make up nucleic acids. A monomer, also known as a building block, of nucleic acids like RNA and DNA is known as a nucleotide. A repeating pattern of the sugar-phosphate backbone with the nitrogenous bases spreading out as the rungs"of the DNA or RNA ladder is created.

The ladder is created when nucleotides are connected together by covalent bonds established between the phosphate group of one nucleotide and the sugar molecule of another nucleotide. This configuration of nucleotides creates the double helix structure in DNA and a number of secondary structures in RNA, which are essential for their biological roles as genetic information carriers and transmitters.

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Answer:

To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.

Answer:

22 and 28 and 22

Explanation:

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Answer:

22

28

22

Explanation:

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The variance in the US continental region is brought on by the shift in daytime and nighttime weather patterns.

Cold, dry, and stable air masses are found in the continental polar (cP) or continental arctic (cA) regions. Radiative cooling causes these air masses to form over northern Canada and Alaska. They travel south, then east via the Plains and the Rockies.

During the winter, a continental polar air mass can develop over the land. It comes from northern Canada or Alaska in the Northern Hemisphere. It transports dry weather to the United States as it goes south. Low humidity and temperature are both present.

These factors contributed to the polar air mass:

During the colder months of the year, continental polar air typically forms over vast land masses.

A cool breeze blows across the upper section of the area, while a warm breeze blows through the lower part.

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Superheating the steam to a higher temperature improves the cycle efficiency.

Superheating the steam to a higher temperature in a simple ideal Rankine cycle improves the cycle efficiency. In a Rankine cycle, the working fluid undergoes four processes: expansion in a turbine, condensation in a condenser, pumping to increase pressure, and heating in a boiler. The cycle efficiency depends on the temperature at which heat is added to the working fluid (boiler temperature) and the temperature at which heat is rejected (condenser temperature). By superheating the steam to a higher temperature before it enters the turbine, the temperature difference between the boiler and the condenser increases. This leads to an improvement in the cycle efficiency.

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densitydensity is the mass per unit volume. It is given by the formula; \(Density=\frac{mass}{volume}\) . The density of given magnesium metal is 43.5002\(g/cm^{3}\).

Use the following formula to calculate magnesium density: -\(P=\frac{m}{v}\) ( where, p represents the density of the object, m represents the mass of the object and v represents volume of the object) ( where, p represents the density of the object, m represents the mass of the object and v represents volume of the object).
Substitute the following values into the formula: m=217.501g, v=5.00cm3, and p=x.
By plugging the values into the formula, we get: x= 217.501/5.00= 43.5002\(g/cm^{3}\).
As a result, the density of the given magnesium metal is 43.5002g/cm3.

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Answer:

Sodium chlorate

Explanation:

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Molar mass of N2 = 14×2=28g/mol

Moles of N2 =mass/molar mass

Mass of N2 = moles × molar mass

Mass of N2 = 15.7 × 28 = 439.6 kg

Answer:

The energy changes in converting reactants to products is the same regardless of the route by which the chemical changes occur.

Answer:

During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean. Now, recall that warmer air is lighter than cooler air. As a result, warm air rises. Therefore, the warmer air over the land surface is rising. As the warm air over the land is rising, the cooler air over the ocean is flowing over the land surface to replace the rising warm air. This is the sea breeze and can be seen at the top of the following image. The bottom of the following image illustrates the land breeze that occurs at night. Recall that the land surface cools quicker than the water surface at night. Therefore, the warmer air over the ocean is buoyant and is rising. The denser cool air over the land is flowing offshore to replenish the buoyant warm air and is called a land breeze.

Explanation:

The hammer and the feather are dropped from  same height by the astronaut on the planet without the air. The feather will fell at the same rate as the the hammer.

The hammer and the feather are dropped from equal  height by the astronaut on the planet without the air. They were the essentially in the vacuum, and there was the no air resistance and because of the feather will fell at the same rate as compared to the hammer, the Galileo had to concluded that the hundreds of the years before.

All the objects that released together will fall at the same rate excluding the factor of the mass.

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Answer:

1. D   2. C   3. B

Explanation:

1. The product is always what is being yielded from the equation, or what is created. Since both 4H2O and 3CO2 are created from the reactants, they are both products of the reaction.

2. The Law of Conservation of Matter states that matter cannot be created, nor destroyed. Therefore, C is not true because new atoms cannot be created in a reaction.

3. The second formula is balanced, but the first is not

Answer: A. wool

Explanation:

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Wool is the natural polymer which he most likely uses in making carpets and the polymer is prepared by polymerization reactions.

Polymerization reactions are  reactions in which large number of monomer molecules react to form polymer .The large molecules which are produced from polymerization may have linear or branched structure.

They can also form a complex three dimensional structure . There are different polymerization reactions like step-growth polymerization, chain -growth polymerization and condensation polymerization.

Polymers containing same kind of monomer are homopolymer and which contain different monomers are heteropolymers. Mechanisms which describe formation of polymers are of different types such as free radical mechanism and chain growth mechanisms.

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Cyclohexene is B. The normal example for cyclohexene is found in the 1H⁻ NMR range, and the normal example for cyclohexene is found in the 13C⁻ NMR range.

The chemical formula for cyclohexene is C₆H₁₀. It shows a doublet of imperative 2 at 1.22 ppm, a septet of fundamental 1 at 2.86 ppm, a singlet of essential 1 at 5.34 ppm, a doublet of fundamental 2 at 6.70 ppm, and a doublet of basic 2 at 7.03 ppm. Cyclohexene exhibits six distinct signs in the 13C-NMR range: 23.9, 34.0, 115.7, 128.7, 148.9, and 157.4.

Cyclohexene is a hydrocarbon that is usually made by hydrogenating benzene. It is used as an industrial intermediate chemical to make tetrahydro benzoic acid, adipic acid, and malic acid and to steal oil.

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Metals lose electrons to achieve a stable electron configuration similar to a noble gas, while nonmetals gain electrons to achieve the same. This electron transfer between metals and nonmetals results in the formation of ionic compounds.


Metals have low ionization energies, which means it requires less energy for them to lose electrons. When metals lose electrons, they achieve a stable electron configuration similar to that of a noble gas. For example, sodium (Na) has an electron configuration of 1s² 2s² 2p⁶ 3s¹. By losing one electron, it becomes Na⁺ with an electron configuration of 1s² 2s² 2p⁶, which is similar to neon (Ne).

On the other hand, nonmetals have high electronegativities, which means they have a strong attraction for electrons. By gaining electrons, nonmetals achieve a stable electron configuration similar to that of a noble gas. For instance, chlorine (Cl) has an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁵. By gaining one electron, it becomes Cl⁻ with an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁶, which is similar to argon (Ar).

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Answer:

1. Oxygen - 46.1%

2. Silicon - 28.2%

3. Aluminium - 8.23%

4. Iron - 5.63%

5. Calcium - 4.15%

6. Sodium - 2.36%

7. Magnesium - 2.33%

8. Potassium - 2.09%

9. Titanium - 0.565%

10.Hydrogen -0.140%

Explanation:

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Answer:

The answer is

Explanation:

To find the number of atoms in an element given it's number of moles we use the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

n = 7.2 mol

The number of atoms in iron ( Fe) is

N = 7.2 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Answer:

10 electrons

Explanation:

The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max. In the picture below, the orbitals are represented by the boxes. You can put two electrons in each box.

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Answer:

10

Explanation:

Yes

Answer:

A

Explanation:

bc its right

Answer:

23

Explanation:

Answer:

B. Spring balance - a device used for measuring the weight or force of gravity acting on an object.

Explanation:

A Force is any interaction that changes the motion or position of an obkpjectbthatbit is interacting with. Whenever there is an interaction between two objects, there is a force exerted by each of the objects on one themselves.

Forces are generally divided into contact forces and non-contact over field forces.

In contact forces, the two objects physically in contact with each other. Examples of contact forces are push or pull forces, frictional forces, tensional forces, spring forces, etc.

Non-contact forces are forces in which the two objects interacting do no need to be physically in contact with one another. Examples include, gravitational forces, magnetic forces, electrical forces, etc.

Instruments used in measuring forces are known as force gauges.

From the instruments listed above:

A. A ruler is an instrument used in measuring length

B. Spring balance is a device used for measuring the weight or force of gravity acting on an object.

C. A thermometer is an instrument used in measuring temperature

D. A windbvane is an instrument used in measuring wind direction.

Answer:

Physical reaction

Explanation:

Since there are no other chemicals in the equation, but the state of the chemical is going from a liquid to a gas, you can conclude that this is a physical reaction.

Answer:

its a

Explanation:

Answer:

c

Explanation:

Answer:

"Earth-centered," or "geocentric" Ptolemy thought that all celestial objects — including the planets, Sun, Moon, and stars — orbited Earth. Earth, in the center of the universe, did not move at all.

Explanation:

Answer:

Geocentric

Explanation:

Its the belief that earth was the center of the solar system instead of the sun

Sam can stir the water after adding the drink mix to help increase or speed up the dissolving process in this scenario.

This is the process in which a solute dissolves in a solvent to form a solution under certain conditions.

Stirring will increase the surface area thereby leading to an increase in the dissolving process which makes it the most appropriate choice.

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