arrange the following afn species in order of increasing f-a-f bond angles: bf3, bef2, cf4, nf3, of2.

Answer:

3 Covalent Bonds and 1 Co ordinate Bond

Explanation:

4 bonds are in NH4¹+

NH4¹+ is the ammonium ion, which consists of a central nitrogen atom (N) and four hydrogen atoms (H). Nitrogen is located in group 15 of the periodic table and has 5 valence electrons. Hydrogen, on the other hand, has 1 valence electron.

To achieve a stable electron configuration, nitrogen needs to share electrons with the hydrogen atoms. Each hydrogen atom can form a single bond with the nitrogen atom by sharing its valence electron.

In NH4¹+, all four hydrogen atoms form single bonds with the central nitrogen atom. These bonds are represented by lines connecting each hydrogen atom to the nitrogen atom.

So, NH4¹+ has 4 bonds. Each bond represents a pair of electrons shared between the nitrogen atom and a hydrogen atom. The bonding arrangement ensures that the nitrogen atom has a complete octet (eight valence electrons) and each hydrogen atom has two electrons, following the stable configuration of helium.

The "+1" charge on NH4¹+ indicates that the ion has lost one electron, resulting in a positive charge. However, the number of bonds remains the same regardless of the charge.

Therefore, the correct answer is 4 for the number of bonds in NH4¹+.

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Answer:0.432 mol. Explanation: Divide the given number of molecules by Avogadro's constant. Avogradro's constant is the number of atoms/molecules ...

Explanation:

Answer:

I have no idea but I think its 15 ;-;

Explanation:

Endosperm is the part of the seed which provides nutrients to embryo.

Inside the seed there are is an embryo which is the baby plant and the endosperm. When the seed begins to grow, the embryo used the endosperm part as a food source for its growth and development so we can conclude that endosperm is the part of the seed which provides nutrients to embryo.

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Answer: The seed leaf

Explanation: 100 on quiz

Considering the Boyle's law, at constante temperature, the pressure required to compress 2500L of hydrogen gas at 1.0 atm into a 30 mL tank is 83,333.33 atm.

Boyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant: if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.

Mathematically, this law says that the product of the pressure and the volume always has the same value:

P×V=k

where

Analyzing an initial state 1 and a final state 2, it is fulfilled:

P₁×V₁= P₂×V₂

In this case, you know:

Replacing in Boyle's law:

1 atm× 2500 L= P₂× 0.03 L

Solving:

(1 atm× 2500 L)÷ 0.03 L= P₂

83,333.33 atm= P₂

Finally, the pressure required is 83,333.33 atm.

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There are 3.44 x 10^{22} particles in 0.057 moles of lithium bromide.

The lithium bromide formula also known as the lithium monobromide formula or Bromo lithium formula is explored. It is a counterion bromide-based salt of lithium.

we have to use Avogadro's constant,

Avogadro's constant, is approximately equal to 6.022 x 10^{22} particles per mole.

we can use the following formula:

number of particles = moles x Avogadro's constant

Substitute the values,

number of particles = 0.057 moles x 6.022 x 10^{23} particles/mol

Simplifying the equation

number of particles = 3.44 x 10^{22} particles

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The order of reaction is defined as the power to which the concentration of the reactants are raised in the rate equation of the reaction.

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Answer:

\(5.5 \times {10}^{ - 5} \: cm\)

Explanation:

We know, that:

\(1nm \: = \: 1 \times {10}^{ - 7} \: cm \)

Now, we can make a proportion according to this:

1nm - 1×10^-7 cm

550 nm - x cm

\(x = \frac{550 \times 1 \times {10}^{ - 7} }{1} = 550 \times {10}^{ - 7} = 5.5 \times {10}^{ - 5} \: cm \: = 0.000055 \: cm\)

Answer: choice: I & Choice E

Explanation:

Answer:

C and G

Explanation:

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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If two liquid solutions are mixed together, the solute would be the one with the lower volume while the solvent would be the solution with the higher volume.

The mixing of two liquids requires that one is a solute while the other is a solvent.

Thus, the solution with the higher volume acts as the solvent while the one with the lower volume act as the solute.

For example, a solution made by mixing 25% water with 75% alcohol has water as the solute and alcohol as the solvent.

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The equation that can be able to complete the reaction as it has been shown is option C

Free energy takes into account both the enthalpy (heat content) and entropy (degree of disorder) of a system. It provides a measure of the system's ability to do useful work or drive chemical reactions.

The formula for calculating free energy is:

G = H - TS

where:

G is the Gibbs free energy

H is the enthalpy (heat content) of the system

T is the temperature in Kelvin

S is the entropy (degree of disorder) of the system

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Answer: 0.0827

Hope This Will Help You And This Should Be The Correct One.

From the calculation, the molecular mass of the  compound would be C2H4O2

We know that the molecular formula can be obtained from the use of the system;

Percentage of oxygen = 100 - (40 + 6.7)

= 53.3 %

C - 40/12,  H - 6.7/1,  O - 53.3/16

C - 3.33,  H - 6.7, O - 3.33

Dividing through by the lowest ratio we have that

CH2O

We are told that the relative molecular mass of the compound is 60 then we have that;

(12 + 2 + 16)n = 60

n = 2

The molecular formula is;

C2H4O2

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The following balanced chemical equation may be used to describe the interaction between aluminum (Al) and calcium nitrate (Ca(NO₃)₂):

2 Al + 3 Ca(NO₃)₂ → 2 Al(NO₃)3 + 3 Ca

Reactants are the chemicals that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

The substances that initiate a chemical reaction. Products are the substances that are created during the reaction. Compounds or elements can act as reactants and products.

Aluminium and calcium nitrate interact in this reaction to form aluminium nitrate (Al(NO₃)₃) and calcium (Ca), which are the end products.

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Answer:

Taking small amounts of chemicals for an experiment is necessary for several reasons:

Accuracy: The amount of chemical used in an experiment needs to be accurate and precise to obtain reliable results. Using too much or too little of a chemical can significantly affect the outcome of the experiment.

Safety: Some chemicals can be hazardous in large quantities, and using small amounts reduces the risk of accidents and exposure to harmful substances. Additionally, handling small amounts of chemicals makes it easier to control and contain spills or leaks.

Cost-effective: Many chemicals used in experiments can be expensive, and using small amounts helps to minimize waste and conserve resources.

Environmental concerns: Proper disposal of chemical waste is crucial to minimize environmental impact, and using small amounts of chemicals reduces the volume of waste generated.

In summary, using small amounts of chemicals is important for accuracy, safety, cost-effectiveness, and environmental concerns.

The dot electron structure of the sodium chloride has been shown in the image attached.

We know that the dot electron structure of a compound has to do with the way that electrons are arranged around the valence shells of the elements that are in the compound. We know that in the dot electron structure, we have to show the symbol of the element and then the electrons that surround the outermost shells of the atom as dots.

Sodium chloride is an ionic compound as such it is composed of sodium ion and the chloride ion and the electrons that are found in each of the ions can be shown in the Lewis dot structure of the compound which is seen in the image that has been attached here. The chloride ion has eight electrons while the sodium ion has no electron.

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To find the number of moles of a given solution, multiply the volume of the solution (in liters) by the molarity of the solution (in molarity). In this case, the volume of the solution is 1.5 liters and the molarity is 0.77 molarity.

Molarity is a measure of concentration of a solute in a solution expressed as the number of moles of solute per liter of solution (mol/L). It is a commonly used unit of concentration in chemistry. Molarity is often used to measure the amount of a solute in a given volume of solution and is also used to calculate the amount of a solute needed to create a given volume of solution at a given concentration.

Moles of KCl = 1.5 L x 0.77 M = 1.155

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Diamonds are composed of carbon in a tetrahedral lattice. That is option C.

A diamond of defined as an allotrope or one of the major forms of the element, carbon in nature.

These carbon atoms are arranged within the diamond in a face centered cubic tetrahedral lattice shape.

Therefore, Diamonds are composed of carbon in a tetrahedral lattice.

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Diamonds are composed of carbon in a tetrahedral lattice. The correct option is C.

Diamonds are one of the allotropes of carbon. The other allotrope of carbon is graphite.

Thus, diamonds are made up of carbon atoms that are tightly packed together. Each carbon atom in a diamond is strongly bonded to 4 other carbon atoms, resulting in the formation of a tetrahedral structure.

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Answer:

Explanation:

40/ 180.2 x (-16 / 1 mole glucose)=-3.6 KJ

The total gaseous mixture is 4.48 g.

The total gaseous mixture can be calculated using the ideal gas law: PV = nRT.

First, we need to convert the temperature to Kelvin: 27.0°C + 273.15 = 300.15 K.

Next, we can use the ideal gas law to calculate the number of moles of each gas:

For He: n = (1.12 atm) (2.00 L) / (0.08206 L·atm/mol·K) (300.15 K) = 0.0906 mol

For Ar: n = (4.53 g) / (39.95 g/mol) = 0.113 mol

The total number of moles of gas in the mixture is then:

n(total) = n(He) + n(Ar) = 0.0906 mol + 0.113 mol = 0.204 mol

Finally, we can calculate the total mass of the mixture:

m(total) = n(total) × M(avg)

where M(avg) is the average molar mass of the mixture, which can be calculated as:

M(avg) = (M(He) + M(Ar)) / 2 = (4.003 g/mol + 39.95 g/mol) / 2 = 21.98 g/mol

Thus,

m(total) = 0.204 mol × 21.98 g/mol = 4.48 g

Therefore, The total weight of the gaseous mixture is 4.48 g.

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The action can speed up the rate of a chemical reaction is breaking a reactant into smaller pieces.

Rate of a chemical reaction tells about the duration of time at which reaction complete.

Rate of reaction is also define as the rate of change of concentration of reactant with respect to the time. So, concentration of reactant is directly proportional to the rate of a reaction and wherever we increases the surface area of reactant rate increases as reactant will participate through large possible side. Catalyst also speeds up the reaction without being involved in it and high temperature also increases the kinetic energy of the reactant to do effective collision.

Hence, option (d) is correct i.e. breaking a reactant into smaller pieces increases the rate.

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Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1.9mole of O\(_2\) will be needed to react with 0.38 mol of C\(_3\)H\(_8\).

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. Stoichiometry represents the number of moles of reactant and products .

The balanced equation for the given reaction can be written as

C\(_3\)H\(_8\) + 5O\(_2\) → 3CO\(_2\) + 4H\(_2\)O

The mole ratio between oxygen and C\(_3\)H\(_8\) is 5:1

1 mole of C\(_3\)H\(_8\)  react with 5 mole of O\(_2\)

0.38 mol of C\(_3\)H\(_8\)  react with 5×0.38 =1.9mole of O\(_2\)

Therefore, 1.9mole of O\(_2\) will be needed to react with 0.38 mol of C\(_3\)H\(_8\).

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Answer:

skin is the fastest growing organ in human beings.

Electron dot structures or Lewis dot formula is generally used if the molecular formula of the compound is known. It explains the nature of bond and position of atoms within the molecule.

Lewis dot structures are defined as the diagrams which is used to describe the chemical bonding between atoms in a molecule. They also represent the total number of lone pairs present in each of the atoms which constitute the molecule.

The atomic number of 'F' is 9, so its Lewis structure is below:

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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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Answer:

\(48.2\ \text{g/mol}\)

Explanation:

Formula mass of compound = 190 g/mol

Molar mass of chlorine = 35.45 g/mol

\(MCl_x\) means 1 mole of \(M\) is present and \(x\) moles of \(Cl\) are present.

So,

\(190=M+xCl\\\Rightarrow 190=M+x35.453\)

Mass of percent of chlorine = 74.8%

\(0.748=\dfrac{\text{Mass of }Cl}{190}\\\Rightarrow \text{Mass of }Cl=0.748\times 190\\\Rightarrow \text{Mass of }Cl=142.12\ \text{g}\)

Now

\(35.45x=142.12\\\Rightarrow x=\dfrac{142.12}{35.45}\\\Rightarrow x=4\)

\(190=M+4\times 35.45\\\Rightarrow M=190-4\times 35.45\\\Rightarrow M=48.2\ \text{g\mol}\)

Atomic mass of the element M is \(48.2\ \text{g/mol}\).

One mole of radiant energy will supply 6.02 x 10^23 photons.

The number of photons is calculated by dividing the overall energy of a pulse by the energy of one photon included inside the pulse.

As a result, an electromagnetic energy particle is known as a photon. Photons have no mass, thus they move at the same rate as light.

we need to first calculate the total energy in one mole of photons,

By combining the energy per photon with Avogadro's number (6.022 x 1023), one may determine the energy of a mole of photons:

Energy per mole of photons = Energy per photon x Avogadro's number

we can calculate the energy per mole of photons:

Energy per mole of photons = 3.37 × 10−19 J x 6.022 x 10^23

Energy per mole of photons = 2.03 x 10^5 J/mol

Number of photons in one mole = Energy per mole of photons / Energy per photon

Number of photons in one mole = 2.03 x 10^5 J/mol / 3.37 × 10−19 J

Number of photons in one mole = 6.02 x 10^23 photons/mol

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