coal and petroleum deposits in the earth are limited explain​

Answer:

Explanation:

Titration: titrate twice, the first time with an indicator to determine how much sodium hydroxide is needed to completely react with hydrochloric acid, and the second time without an indicator to prevent the contamination of the sodium chloride salt produced

If the equilibrium constant, Kc, for the following reaction is 1.89 × 10⁻⁶at 506 K, Kc for the reaction: NH3(g) + HCl(g) → NH4Cl(s)is 5.291 × 10⁵.

The given reaction is: NH4Cl(s) → NH3(g) + HCl(g)

To calculate Kc for the reaction: NH3(g) + HCl(g) → NH4Cl(s) we must reverse the given reaction. We must use the relationship: If aA + bB ⇌ cC + dD then Kc = [C]c[D]d/[A]a[B]b where [A], [B], [C], [D] are molar concentrations at equilibrium, while a, b, c, d are the coefficients of the balanced chemical equation. To reverse the given reaction, we must invert the value of the Kc. The equation is: NH4Cl(s) ⇌ NH3(g) + HCl(g)Kc = 1.89 × 10⁻⁶at 506 K

Now, we will invert this equation. Kc(NH3)(HCl) = 1/Kc(NH4Cl)

Now, substituting the values: Kc(NH3)(HCl) = 1/(1.89 × 10⁻⁶)Kc(NH3)(HCl) = 5.291 × 10⁵

Therefore, Kc for the reaction:NH3(g) + HCl(g) → NH4Cl(s)is 5.291 × 10⁵.

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Answer:

Matter has mass and takes up space, everything has matte, your body takes up space.  Matter refuels the body. You can also so your body produces matter as well

Answer:freezing can occur

Source:trust me bro

Answer:

By forming an activated complex with lower energy.

Explanation:

When catalyst is added to a reaction , it forms  an activated catalyst which has lower activation energy . So initiation of reaction requires less energy and reaction becomes fast .

Hence third option is correct.

The frequency of a wave 2.8 x 10³ Hertz is then the wavelength of these gamma rays is 107 nm

Wavelength is the the distance between two successive crests or troughs of a wave

Here given data is

Frequency = 2.8 x 10³ Hertz

Velocity of gamma rays = 3×10⁸m/s

We have to calculate wavelength of these gamma rays?

So, wavelength = velocity/frequency

λ = v/f

λ = 3×10⁸m/s/2.8 x 10³ Hertz

λ = 107 nm

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TLC means Thin Layer Chromatography. It is a method that can best be described as "Affinity-Based" used in the separation of compounds that are in a mixture.

Unreacted p-nitrobenzaldehyde is simply an organic aromatic compound that contains a nitro group para-substituted to an aldehyde. in this case, if it is unreacted, that means it is the same as before the chemical reation.

Note that the question is missing key information hence the general answer.

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The molar solubility of lead(II) fluoride in 0.050 M NaF at 25°C is approximately 1.4 x 10⁻⁵ mol/L.

The solubility of a compound can be affected by the presence of other ions in solution, which can cause the equilibrium to shift. In this case, the presence of NaF will provide additional fluoride ions (F⁻) in the solution, which can potentially affect the solubility of lead(II) fluoride (PbF₂).

To determine the molar solubility of PbF₂ in 0.050 M NaF, we need to consider the common ion effect. The additional fluoride ions from NaF can react with Pb²⁺ ions to form PbF₄²⁻ complex ions, reducing the concentration of Pb²⁺ ions in solution and affecting the solubility equilibrium.

Since the molar solubility of PbF₂ in pure water is given as 2.1 x 10⁻³ mol/L, we can assume that the concentration of Pb²⁺ ions is also 2.1 x 10⁻³ mol/L in the presence of excess F⁻ ions.

Using the balanced equation for the dissolution of PbF₂: PbF₂(s) ⇌ Pb²⁺(aq) + 2F⁻(aq), we can establish the solubility product expression: Ksp = [Pb²⁺][F⁻]².

Substituting the known values, we have: Ksp = (2.1 x 10⁻³)(2.1 x 10⁻³)².

Now, considering the presence of 0.050 M NaF, the concentration of F⁻ ions in solution will be 0.050 M. Since the concentration of Pb²⁺ ions will be reduced due to the formation of PbF₂⁻ complex ions, we can assume it to be x M.

Using the solubility product expression again, we have: Ksp = (x)(0.050)².

Equating the two expressions for Ksp, we can solve for x, which represents the molar solubility of PbF₂ in 0.050 M NaF.

(x)(0.050)² = (2.1 x 10⁻³)(2.1 x 10⁻³)².

Solving the equation, the molar solubility of PbF₂ in 0.050 M NaF is approximately 1.4 x 10⁻⁵ mol/L.

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Answer:

Balanced Chemical Equation

2FeBr3 + 3Ba(OH)2 → 2Fe(OH)3 + 3BaBr2

Explanation:

Reaction Information

Ferric Bromide + Barium Hydroxide = Iron(III) Hydroxide + Barium Bromide

Reaction Type

Double Displacement (Metathesis)

Reactants

Ferric Bromide - FeBr3

FeBr3

Molar Mass of Br3Fe Oxidation State of Br3Fe

Barium Hydroxide - Ba(OH)2

Caustic Baryta Barium Hydroxide Lime Ba(OH)2 Barium Dihydroxide Hydrate

Molar Mass of BaH2O2 Oxidation State of BaH2O2

Products

Iron(III) Hydroxide - Fe(OH)3

Ferric Hydroxide Ferric Oxide Yellow

Molar Mass of FeH3O3 Oxidation State of FeH3O3

Barium Bromide - BaBr2

Molar Mass of BaBr2 Oxidation State of BaBr2

FeBr3 + Ba(OH)2 = Fe(OH)3 + BaBr2

Instructions

To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above.

i hope it's help you

Answer: Your question doesen't make since and you should word it better but what I think you are asking is...

The ___ of a bomb calorimete is constant, what is the temperatue, pressure and volume of it?

Explanation: GL to the next person who tries to answer this.

There are D) 9.51E23

Given

1.58 moles of LiOH

Required

The number of formula units

Solution

The mole is the number of particles(molecules, atoms, ions, formula units) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

So for 1.58 moles :

= 1.58 x 6.02 x 10²³

= 9.5116 x 10²³

The number of molecules that are needed in a 23.45 g sample of copper (ii) hydroxide, are 1.45 x 10²³.

Avogadro's number is the measurement of the one mole of any substance that is equal to the Avogadro's number.

Avogadro's number is 6.022 × 10²³.

To calculate the moles

Moles = mass / molar mass

Mass is 23.45 g

Molar mass is 97.562

Putting the value in equation

Moles = 23.45 g/ 97.562 = 0.24 mol.

The moles of copper (II) hydroxide has been 0.24 mol.

The number of molecules in 0.24 mol sample has been driven by:

1 mol = 6.022 × 10²³.

0.24 mol = 0.24 x 10²³.

0.24 mol = 1.45 x 10²³.

Thus, the number of molecules that are needed in a 23.45 g sample of copper (ii) hydroxide, are 1.45 x 10²³.

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Answer:

an acid +metal =salt +hydrogen

Explanation:

HCL+Mg =Mgcl2+H2

(because Mg has an ion with a +2 charge ,it attracts Cl with a -2 charge )

therefore the correct answer is D for the above reasons

Answer:

When magnesium reacts with hydrochloric acid (HCl), a single-replacement reaction occurs. These reactions involve the substitution of one element in a compound with another. In this case, the hydrogen in HCl will be swapped with the magnesium metal because both of these elements make cations (positively-charged ions) when they participate in ionic bonding.

So why does the chorine have a subscript of 2 when it bonds with magnesium? This occurs in order to balance the ionic charges and make the overall compound neutral.

Magnesium wants to give away 2 electrons when it ionizes, forming the cation Mg²⁺. However, chlorine only wants to gain 1 electron to fill its valence shell, making it form the anion, Cl⁻. As you can see, if just one of each ion were to bond, the compound would have an overall charge of +1 because (+2 - 1 = +1). Therefore, the compound can be made neutral if two chlorine ions bond with just 1 magnesium ion (+2 - 1 - 1 = 0).

The hydrogen ion from HCl becomes H₂ after the reaction occurs. This occurs because hydrogen generally exists as a diatomic compound in nature (diatomic = exists as 2 atoms).

The complete balanced equation for the reaction is:

Mg + 2 HCl  ------> MgCl₂ + H₂

The pH of the solution is approximately 0.444.

To find the pH of the solution, we need to first determine the concentration of the diluted solution.

Given:
Initial volume (V1) = 572.0 mL
Initial concentration (C1) = 0.6300 M
Final volume (V2) = 1.000 L

We can use the dilution formula to find the concentration of the diluted solution:
C2 = (C1 * V1) / V2

Substituting the given values:
C2 = (0.6300 M * 572.0 mL) / 1.000 L
C2 = 0.3604 M

Now, we can use the formula for calculating pH, which is given by:
pH = -log[H+]

Since HCl is a strong acid, it completely dissociates into H+ ions. Thus, the concentration of H+ ions in the solution is equal to the concentration of the HCl.

Therefore, the pH of the solution is:

pH = -log(0.3604)
pH ≈ 0.444

So, the pH of the solution is approximately 0.444.

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109.5

when we see it in 3d dimension...the repulsion force of the bonding pairs maximaze the distance from each other, thus making the angle 109.5

Answer:

here is your answr

Explanation:

The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. For example, turning on a light would seem to produceenergy; however, it is electrical energy that is converted.

Answer:

the law of thermodynamics energy cannot be destroyed or created. energy can only be changed or transferred from one form to another. for example turning on a light would be seem produced energy, however electrical energy can be produced

From 3.85 moles of propane, 11.55 moles of carbon dioxide and 15.40 moles of water are formed.

From the balanced equation, we can see that for every 1 mole of propane (C3H8) that reacts, 3 moles of carbon dioxide (CO2) and 4 moles of water (H2O) are formed.

Given that we have 3.85 moles of propane, we can calculate the moles of carbon dioxide and water produced using the mole ratios:

Moles of CO2 = 3.85 mol propane × (3 mol CO2 / 1 mol propane) = 11.55 mol CO2

Moles of H2O = 3.85 mol propane × (4 mol H2O / 1 mol propane) = 15.40 mol H2O

Therefore, from 3.85 moles of propane, 11.55 moles of carbon dioxide and 15.40 moles of water are formed.

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Compound          Type of IMFs                   Sublime at STP?

Carbon dioxide       London dispersion         Yes

Hydrogen fluoride  Hydrogen bonding   No

Calcium chloride     Ionic bonding                  No

Naphthalene        London dispersion         Yes

Iodine                      London dispersion        Yes

Sodium chloride        Ionic bonding                 No

Water                    Hydrogen bonding         No

A chemical compound is described as  a chemical substance composed of many identical molecules containing atoms from more than one chemical element held together by chemical bonds.

London dispersion forces are also described as a type of intermolecular force acting between atoms and molecules that are normally electrically symmetric.

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Answer:

D. 108g of water

Explanation:

16g CH4 produces 2(18)g of H20

1g CH4 produces \(\frac{36}{16}\)g of H2O

48g CH4 produces \(\frac{36}{16}\)×48

                                108g of H20

Answer:

D. 108g of water

Explanation:

Answer:

Q = 836 J

Explanation:

Given data:

Mass of water = 10.0 g

Temperature increased =ΔT = 20°C

Specific heat  capacity of water = 4.18 J/g.°C

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Q = 10.0 g × 4.18 J/g.°C  × 20°C

Q = 836 J

Answer:

Sodium Fluoride F 18 Injection is a positron emitting radiopharmaceutical, no-carrier added.

Explanation:

Element Name Fluorine

Element Symbol F

Atomic Number 9

Answer:3

Explanation:

5.6 L of \(CH_{4}\) contains the same number of molecules 5.6 L of \(H_{2}\).

Define mole.

The mole is always the SI unit used to measure a substance's quantity.

Define molecules.

The smallest particle of a substance. It contains 2 or more atoms.

5.6 L of \(CH_{4}\):

No of moles=Given volume/molar volume

                    = \(5.6/22.4\)

                    = \(0.25\)

No of molecules=No of moles*Avagadro's number

                           = \(0.25*6.023*10^{23}\)

                           = \(1.51*10^{23}\)

5.6 L of \(H_{2}\):

No of moles=Given volume/molar volume

                     = \(5.6/22.4\)

                     = \(0.25\)

No of molecules = No of moles * Avagadro's number

                            = \(0.25*6.023*10^{23}\)

                            = \(1.51*10^{23}\)

Therefore, the answer is 5.6 L of \(H_{2}\).

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Answer:

The reason why the YMCA is a good one I can get it to me if t

There are 150 oxygen atoms in 15 molecules of tetraphosphorus decoxide (P₄O₁₀).

Tetraphosphorus decoxide (P₄O₁₀) consists of four phosphorus atoms and ten oxygen atoms. To determine the number of oxygen atoms in 15 molecules of P₄O₁₀, we can first calculate the total number of oxygen atoms in one molecule and then multiply by 15.

The subscript "10" in P₄O₁₀ indicates that there are ten oxygen atoms. Therefore, in one molecule of P₄O₁₀, we have:

10 oxygen atoms

To find the number of oxygen atoms in 15 molecules of P₄O₁₀, we multiply the number of oxygen atoms per molecule by the number of molecules:

Number of oxygen atoms = 10 oxygen atoms/molecule × 15 molecules

Number of oxygen atoms = 150 oxygen atoms

So, there are 150 oxygen atoms in 15 molecules of tetraphosphorus decoxide (P₄O₁₀).

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The term for the component of a solution that is present in the greater quantity is the solvent, as in a solution, the solvent refers to the component that is present in a larger quantity or amount compared to the other component, which is called the solute.

The solvent is the substance that dissolves the solute to form a homogeneous mixture. It is typically a liquid, but it can also be a gas or a solid. The solute, on the other hand, is the substance that is dissolved within the solvent. The solvent provides the medium in which the solute particles are dispersed and dissolved. It determines the physical state (such as liquid or gas) of the solution. The solute, being present in a lesser quantity, becomes evenly distributed within the solvent particles.

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