IUPAC name for [Fe(NH3)4Cl2]NO3

Ethanol is proven to reduce combustion emissions. Hydrogen can produce more energy per pound of fuel.

A chemical reaction involving two or more chemicals, generally including oxygen, that produces light and heat in the form of a flame.

The pace which the reactants mix is fast, due in part to the structure of the chemical process and in part to the fact that more energy is created than can escape through into surrounding medium. Ethanol is proven to reduce combustion emissions. Hydrogen can produce more energy per pound of fuel.

Therefore, ethanol is proven to reduce combustion emissions. Hydrogen can produce more energy per pound of fuel.

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Answer:

A and C

Explanation:

both stay the same in every experiment

Explanation: Ammonia has pretty strong intermolecular forces because it can form hydrogen bonds, however it can't form as many hydrogen bonds per molecule as water and so its boiling point and melting point are lower.

As ammonia has less intermolecular force of attraction, it have usually low boiling point.

Hydrogen bonding is not a covalent bond to a hydrogen atom, but rather a type of dipole-dipole attraction between molecules.

The attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as an N, O, or F atom and another very electronegative atom causes it.

When a hydrogen atom bonded to an electronegative atom approaches another electronegative atom, strong intermolecular forces are created.

Simple molecules include hydrogen, ammonia, methane, and pure water. All of them have strong covalent bonds among both their atoms but much weaker intermolecular forces.

When one of these substances melts or boils, the weak intermolecular forces, not the strong covalent bonds, break.

Thus, ammonia usually have low boiling point.

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The amount of dry NH₄HCl needed to prepare a buffer solution that has a pH of 8.56 is 188.29 grams.

To prepare the buffer solution with a pH of 8.56, first, we need to calculate the concentration of NH₄⁺ ions using the Henderson-Hasselbalch equation:

pH = pKa + log([NH₄⁺]/[NH₃])

Since we have pH and [NH₃], we need to find pKa using Kb for ammonia:

Kb = 1.8 × 10⁻⁵
Kw = 1 × 10⁻¹⁴ (ion product of water)

Ka = Kw / Kb = 1 × 10⁻¹⁴ / 1.8 × 10⁻⁵ = 5.56 × 10⁻¹⁰
pKa = -log(Ka) = 9.26

Now, we can use the Henderson-Hasselbalch equation:

8.56 = 9.26 + log([NH₄⁺]/(0.800))

Rearranging to find [NH₄⁺]:

[NH₄⁺] = 0.800 * 10^(9.26 - 8.56) = 0.800 * 10^(0.70) = 1.6 M

Now, we can calculate the grams of NH₄Cl needed to achieve this concentration:

1.6 mol/L * 2.20 L = 3.52 mol of NH₄Cl

Finally, convert moles to grams using the molar mass of NH₄Cl (53.49 g/mol):

3.52 mol * 53.49 g/mol = 188.29 g

So, you need to add 188.29 grams of dry NH₄Cl to the 2.20 L of 0.800 M NH₃ solution to prepare the buffer with a pH of 8.56.

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Phospholipids are amphipathic molecules, meaning they have both hydrophobic and hydrophilic regions. In an aqueous environment like water, phospholipids arrange themselves into a bilayer structure, with the hydrophobic tails oriented inward and the hydrophilic heads facing outward towards the water.

In a hydrophobic substance like methane, phospholipids would not form a bilayer structure because there would be no polar environment for the hydrophilic heads to interact with. Instead, phospholipids would likely aggregate or create different structures to minimize their exposure to the hydrophobic environment.

Forming a bilayer structure is crucial for the function of cell membranes, as it provides a selectively permeable barrier. In a hydrophobic substance like methane, the absence of a bilayer structure would result in increased membrane permeability. The hydrophobic substance could penetrate and disrupt the lipid structure more efficiently, compromising the membrane's ability to regulate the passage of ions, molecules, and other substances.

Therefore, the absence of a polar environment like water would affect the formation of the phospholipid bilayer.

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The balanced chemical equation for the reaction between carbon (C) and oxygen (O2) to form carbon monoxide (CO) and carbon dioxide (CO2) is below and the moles of CO2 produced is 0.117.

C + O2 → CO + CO2

According to the equation, for every 1 mole of C, we need 1 mole of O2 to produce 1 mole of CO and 1 mole of CO2.

Given that we have 0.155 moles of C and 0.117 moles of O2, we can use the mole ratio from the balanced equation to determine how many moles of CO2 could be produced:

Moles of CO2 = Moles of C = 0.155 moles

Therefore, based on the moles of each reagent, we could produce a maximum of 0.155 moles of CO2.

To determine the limiting reagent, we need to calculate the amount of CO2 that would be produced if all of the limiting reagent were consumed. We can do this by comparing the amount of CO2 that would be produced by each reagent and identifying the one that produces the smaller amount:

Using C as the limiting reagent:

Moles of CO2 produced = Moles of C = 0.155 moles

Using O2 as the limiting reagent:

Moles of CO2 produced = Moles of O2 × (1 mole CO2 / 1 mole O2) = 0.117 moles × (1 mole CO2 / 1 mole O2) = 0.117 moles

Since the amount of CO2 produced by the reaction with C is greater than the amount produced by the reaction with O2, we can conclude that O2 is the limiting reagent for this problem. Therefore, only 0.117 moles of CO2 could be produced based on the available amount of O2, and any excess C would be left over after the reaction.

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Answer: Thermal Energy

Explanation:

The propagation step in the free radical chlorination of methane is:

∙CH₃ + Cl∙ → CH₃Cl

In the free radical chlorination of methane, the propagation step is a crucial part of the overall reaction mechanism. It involves the interaction between a methyl radical (∙CH₃) and a chlorine radical (Cl∙), resulting in the formation of chloromethane (CH₃Cl).

During the propagation step, the methyl radical (∙CH₃) and chlorine radical (Cl∙) combine to produce chloromethane (CH₃Cl). This reaction occurs through the abstraction of a hydrogen atom from methane by the chlorine radical, forming a new C-Cl bond and generating a new methyl radical. The overall reaction can be represented as follows:

∙CH₃ + Cl∙ → CH₃Cl

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Diffusion is the net movement of anything generally from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in Gibbs free energy or chemical potential.

The process by which a solid is converted to a gas is called _______

Liquefaction : It is the process by which the substance in the gaseous state is converted to the liquid state.

For example : Oxygen

Vaporization : It is the process by which the substance from the liquid or solid state is converted to the gaseous state.

For example: Wet clothes drying in the sun.

Condensation : It is the process in which the gaseous water is converted into liquid water. For example - Morning dew on the grass.

Answer:

c) sublimation.

Explanation:

The process by which a solid is converted to a gas is called sublimation. So the answer is (c).

Answer:

Minerals

Explanation:

I looked it up on google. Thanks.

Answer:

Explanation:

Here, we want to calculate the percentage composition of the compound formed when oxygen reacts with iron

We have the equation of reaction as follows:

The compound formed is Fe2O3

Now, let us get its percentage composition

The molar mass of the compound is 160 g/mol

The atomic mass of iron is 56 amu

The atomic mass of oxygen is 16 amu

Now, let us get the percentage composition:

The closest here is thus the option C

Answer:

4

Carbon has four valence electrons and here a valence of carbon is four.

Answer:

4

Explanation:

needs four electrons to complete its orbit

Answered it coz of you

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Answer:

the answer is B

the reaction of the equilibrium for caco3 was found to be: CaCO 3(s)⇌CaO(s)+CO 2(g); K c=0.005 mole/litre A 3.25 g

what is calcium carbonate (caco3) ?

CaCO3 is the chemical formula for calcium carbonate. It is found in rocks as the minerals calcite and aragonite (most notably as limestone, a form of sedimentary rock composed primarily of calcite) and is the primary component of eggshells, gastropod shells, shellfish skeletons, and pearls. Calcareous refers to things that contain or resemble calcium carbonate. The active element in agricultural lime is calcium carbonate, which is formed when calcium ions in hard water combine with carbonate ions to form limescale. It is used in medicine as a calcium supplement or as an antacid, but excessive ingestion can be harmful, causing hypercalcemia and digestive problems.

the reaction of the equilibrium for caco3 was found to be: CaCO 3(s)⇌CaO(s)+CO 2(g); K c=0.005 mole/litre A 3.25 g

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Answer:

But TVs de dog was nru

Explanation:

Answer:

The answer is B, a value or characteristic that can take different values

Explanation:

ex.) 1s + 3

s is the variable

Variables are the varying or unchangeable data or factors in an experimental design. It can be defined as a characteristic that can have different values. Thus, option B is correct.

Variables are experimental characteristics that may be consistent or can be changeable. In an experimental design, the variables are used to analyze the cause and effect.

The variables of an experiment can be dependent, independent, or controlled. The varying factors in an experiment to analyze are called independent variables.

The factors that depend and respond to the effect of the independent variables are called dependent variables. These all values are contrasted to the control group with a fixed value.

Therefore, in option B, the variables are the characteristics with the same or different values.

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The given mass of nickel in the 5-cent coin is 5.00 g. To find out what fraction of the nickel atoms' electrons, removed and placed 1.12 m above it, would support the weight of this coin, we can use the concept of Coulomb's law and gravitational force.

Let's begin:

Mass of the coin = 5.00 g = 0.00500 kg

The mass of one nickel atom is 58.6934 u.

Therefore, the number of atoms present in the coin is:

Number of nickel atoms = 0.00500 kg / (58.6934 g/mol) x (1 mol / 6.022 x 10²³ atoms)

= 4.96 x 10²¹ atoms

Charge on an electron = 1.602 x 10⁻¹⁹ C

The force due to gravity acting on the coin is given by the formula:

Fg = m x g

where m is the mass of the coin and

g is the acceleration due to gravity = 9.8 m/s²

Fg = 0.00500 kg x 9.8 m/s²

= 4.90 x 10⁻² N

The force of attraction between an electron and a nickel atom can be calculated using Coulomb's law.

F = (k x q₁ x q₂) / r²

where k = 9 x 10⁹ Nm²/C² is the Coulomb constant

q₁ and q₂ are the charges on the electron and the nickel nucleus, respectively.

They can be calculated as follows:

q₁ = -1.602 x 10⁻¹⁹ C (since the electron is negatively charged)

q₂ = 28 x 1.602 x 10⁻¹⁹ C (since a nickel nucleus has 28 protons)

The distance between the electron and the nickel nucleus is given as r = 1.12 m.

Therefore, the force of attraction between them is:

F = (9 x 10⁹ Nm²/C²) x (-1.602 x 10⁻¹⁹ C) x (28 x 1.602 x 10⁻¹⁹ C) / (1.12 m)²

F = -5.13 x 10⁻¹¹ N

The negative sign indicates that the force is attractive.

To find out how many electrons are required to support the weight of the coin, we need to divide the weight of the coin by the force acting on each electron:

N = Fg / F

= (4.90 x 10⁻² N) / (5.13 x 10⁻¹¹ N)

N = 9.54 x 10⁹ electrons

The total number of electrons in the nickel atoms present in the coin is given by the formula:

Number of electrons = Number of atoms x Number of electrons per atom

Number of electrons per nickel atom = 28 (since a nickel atom has 28 electrons)

Therefore,

Number of electrons = 4.96 x 10²¹ x 28

= 1.39 x 10²³ electrons

The fraction of electrons that would support the weight of the coin is given by dividing N by the total number of electrons:

fraction = N / (Number of atoms x Number of electrons per atom)

fraction = (9.54 x 10⁹) / (4.96 x 10²¹ x 28)

fraction = 6.51 x 10⁻¹³

Therefore, the fraction of the nickel atoms' electrons, removed and placed 1.12 m above it, that would support the weight of this coin is 6.51 x 10⁻¹³.

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Answer:

its the fourth one please mark as brainlest

Explanation:

Neutron diffraction, on the other hand, is commonly used to determine magnetic structures in materials due to the interaction of neutrons with magnetic moments.

X-ray diffraction, electron diffraction, and neutron diffraction are commonly used techniques to study the crystallographic properties of solids.

Here's a comparison of these three techniques in terms of particle energies and types of information obtained:

Particle Energy:

X-rays have high energy in the electromagnetic spectrum.

Information Obtained:

X-ray diffraction provides information about the arrangement of atoms within a crystal lattice, crystal symmetry, interatomic distances, and crystal plane orientations.

It is widely used for structural determination of crystalline materials.

Surface Crystallography:

X-ray diffraction is suitable for studying the bulk crystal structure and is less appropriate for surface crystallography due to the low penetration depth of X-rays in materials.

Particle Energy:

Electrons can have high energies (e.g., in electron microscopy) or low energies (e.g., in electron diffraction experiments).

Information Obtained:

Electron diffraction can provide detailed structural information about crystals, including crystal symmetry, lattice parameters, and atomic arrangement.

It is particularly useful for studying small crystals, nanostructures, and thin films.

Surface Crystallography:

Electron diffraction can be used to study surface crystallography, as electrons can penetrate the surface layers of materials.

Particle Energy:

Neutrons have intermediate energy levels.

Information Obtained:

Neutron diffraction provides information about atomic positions, magnetic moments, and magnetic structures of materials.

It is particularly sensitive to light elements and can be used to determine the positions of hydrogen atoms in crystal structures.

Surface Crystallography:

Neutron diffraction is less commonly used for surface crystallography due to the limited penetration depth of neutrons in materials.

For studying surface crystallography, electron diffraction is generally the most appropriate technique due to its ability to penetrate surface layers and provide detailed structural information at the nanoscale.

Neutron diffraction, on the other hand, is commonly used to determine magnetic structures in materials due to the interaction of neutrons with magnetic moments.

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Answer:

answer

Explanation:

explination

Answer:

gold is metal which is a very good conductor for electric current and most chips are made out of it.

Answer:

The answer is D. gold

Explanation:

A lithium and copper reagent complex, R2CuLi, where R is an alkyl or aryl, is referred to as a Gilman reagent.

The structure of organobromide or bromomethane is CH3Br. The structure is given above.

The production of carbon-carbon bonds in organic synthesis is accomplished using the Gilman reagent, also known as organocopper compounds. These substances are named after American scientist Henry Gilman, who first described them in the 1930s.

These chemicals are advantageous because they react with organic halides to exchange the halide group for a R group, unlike similar Grignard reagents and organolithium reagents.

Two steps can be used to manufacture the Gilman reagent: First, by mixing alkyl halide in pentane solvent with lithium metal powder. Secondly, by mixing alkyllithium in tetrahydrofuran at 78 °C with copper(I) bromide.

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The mass of the sample is the product of its volume and density. The mass of the zinc sample is 457.2 g.

What is density?

Density of a sample is its measure of mass per unit volume. It tells how much denser the substance is in a given volume. The volume of the substance is the space occupied by it.

Volume of a solid  is the product of its length, breadth and height.

Given the dimensions of Zn sample is 2.5, 4 and 6 cm.

volume = 2.5 × 4 × 6 cm

            = 60 cm³

Density = 7.62 g/cm³.

Mass of the sample is the product of its volume and density. Thus, mass of zinc sample is:

mass of Zn = volume × density

                   =  7.62 g/cm³ × 60 cm³

                   = 457.2 g.

Therefore, the mass of the Zn sample is 457.2 g.

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Answer:
Answer 1: The mass of magnesium contained in the compound is 0.57g, which can be determined by subtracting the mass of the crucible and lid (31.064g) from the mass of the crucible, lid, and magnesium ribbon (31.634g).

Answer 2: The mass of oxygen contained in the compound is 1.39g, which can be determined by subtracting the mass of the crucible, lid, and magnesium oxide (31.970g) from the mass of the crucible and lid (31.064g).

Answer 3: The change in mass between the two can be accounted for by the reaction of the magnesium with oxygen to form magnesium oxide.

Answer 4: The number of moles of magnesium is 0.0995 (2.39/24) and the number of moles of oxygen is 0.0868 (1.39/16). Dividing the moles of each element by the smallest amount of moles (0.0868) results in a simplest ratio of 1:1. Therefore, the empirical formula of magnesium oxide is MgO.

Answer 5: The known formula for magnesium oxide is MgO, which is the same as the empirical formula determined in question 4.

The temperature at which a reaction becomes spontaneous depends on the change in enthalpy and entropy, which can be calculated using the equation ΔG = ΔH - TΔS. In this case, a temperature above 1564 Kelvin is required for the reaction to be spontaneous.

The spontaneity of a reaction is determined by the change in free energy, which is calculated using the equation ΔG = ΔH - TΔS, where ΔG is the change in free energy, ΔH is the change in enthalpy, T is the temperature in Kelvin, and ΔS is the change in entropy.

If ΔG is negative, the reaction is spontaneous. Therefore, we need to find the temperature at which ΔG becomes negative.

Given ΔH = 498 kJ and ΔS = 319 J/K, we can plug these values into the equation and solve for T:

ΔG = ΔH - TΔS

-ΔG = TΔS - ΔH

T = (ΔH/ΔS)

T = (498 kJ / 319 J/K)

T = 1564 K

Therefore, the reaction will be spontaneous above a temperature of 1564 Kelvin.

In summary, the temperature at which a reaction becomes spontaneous depends on the change in enthalpy and entropy, which can be calculated using the equation ΔG = ΔH - TΔS. In this case, a temperature above 1564 Kelvin is required for the reaction to be spontaneous.

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Answer:

This chemical equation represents Photosynthesis. 6CO2 means there are 6 molecules of carbon dioxide. 6H20 means there are 6 water molecules. Then when sunlight is added, Photosynthesis occurs giving you the products of Glucose (6CH12O6) and Oxygen (6O2).

Explanation:

Answer:A

Explanation:

Answer:

ionic compound

Explanation:

ionic bonding

In ionic bonding, electrons are completely transferred from one atom to another. In ionic bonding, electrons are completely transferred from one atom to another. In the process of either losing or gaining negatively charged electrons, the reacting atoms form ions.

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