ch3ch(oh)co2h is the chemical formula of which compound?

To calculate the pH of the buffer, we first need to find the concentration of NH4+ and NH3 in the solution.

The dissociation of NH4Cl in water is as follows:

NH4Cl → NH4+ + Cl-

Since NH4Cl is a strong electrolyte, it dissociates completely in water, and the concentration of NH4+ in solution is the same as the initial concentration of NH4Cl:

[ NH4+ ] = 0.250 M

The reaction between NH3 and water is as follows:

NH3 + H2O ⇌ NH4+ + OH-

The base dissociation constant for ammonia (Kb) is 1.8 x 10^-5. We can use this value to find the concentration of NH3 and OH- in the solution.

Let x be the concentration of NH3 in the solution. Then, the concentration of NH4+ will be 0.250 M - x (since NH4+ and NH3 are in equilibrium). The concentration of OH- can be calculated using the Kb value:

Kb = [ NH4+ ][ OH- ] / [ NH3 ]

1.8 x 10^-5 = (0.250 M - x) x / (0.250 M)

x = 0.0564 M (concentration of NH3)

[ OH- ] = Kb x / [ NH4+ ]

[ OH- ] = (1.8 x 10^-5) (0.0564 M) / (0.250 M - 0.0564 M)

[ OH- ] = 4.37 x 10^-6 M

Since this is a basic solution, the pH can be calculated using the pOH equation:

pOH = -log [ OH- ]

pOH = -log (4.37 x 10^-6)

pOH = 5.36

The pH can be found by subtracting the pOH from 14:

pH = 14 - pOH

pH = 14 - 5.36

pH = 8.64

Therefore, the pH of the buffer is 8.64.

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(ii) In this experiment the student uses 1.70 g of the anhydrous copper(II) sulfate.

Calculate the molar enthalpy change (delta H) in kJ/mol.

Include a sign in your answer.

[Mr, of CuSO4 =

Answer:

S°(Hg) = 76.02 J/K· mol

Explanation:

Answer:

3

Explanation:

The reaction is given as:

           H₂S   +   O₂   →  SO₂    +    H₂O

Let us balance the chemical equation.

 We take some letters and we use them as the coefficient to balance the equation;

          aH₂S   +   bO₂   →  cSO₂    +    dH₂O

Now,

  Conserving H;

         2a  = 2d

 Conserving S;

         a = c

 Conserving O;

        2b  = 2c + d  

Let a  = 1, d  = 1, c  = 1, b  = \(\frac{3}{2}\)  and multiply through by 2;

    a = 2, b  = 3, c  = 2 and d = 2

So, the balanced reaction equation is given as;

    2H₂S   +   3O₂   →  2SO₂    +    2H₂O

The standard reaction entropy of N2(g) + 3 H2(g) → 2 NH3(g) is -196.3 J/K·mol.

What do you mean by standard reaction entropy?

Standard reaction entropy (ΔS°) is a measure of the disorder or randomness of a chemical reaction at a constant temperature and pressure. It is defined as the change in the entropy of the system when a reaction occurs under standard conditions. The standard state for a substance is its pure form at a pressure of 1 bar and a temperature of 25°C (298 K).

The standard reaction entropy (ΔS°) of a reaction can be calculated using the standard molar entropies (S°) of the reactants and products. The formula to calculate the standard reaction entropy is:

ΔS° = ΣS° (products) - ΣS° (reactants)

To calculate the standard reaction entropy for the reaction: N2(g) + 3 H2(g) → 2 NH3(g)

S° (N2) = 191.8 J/K·mol

S° (H2) = 130.6 J/K·mol

S° (NH3) = 192.5 J/K·mol

ΔS° = [2(S° (NH3)) - (S° (N2) + 3(S° (H2))]

ΔS° = [2(192.5) - (191.8 + 3(130.6))] J/K·mol

ΔS° = -196.3 J/K·mol

Hence, the standard reaction entropy of N2(g) + 3 H2(g) → 2 NH3(g) is -196.3 J/K·mol.

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Answer:

lol don't know please don't report me

Depending on the beer's  and brewing method, the alcohol concentration can vary greatly, however most beers normally have an driving.Alcohol is a common part of many civilizations

Alcohol is a molecule that is created when sugar or starch is fermented in a variety of drinks, such as beer, wine, and spirits. It is a psychoactive chemical that affects the central nervous system and has many different physiological effects, such as euphoria, relaxation, lowered inhibitions poor judgement, and reduced response times. Although alcohol is frequently consumed for its social or recreational benefits, excessive consumption can have negative health effects. Many health issues, such as liver damage, high blood pressure, and an increased risk of cancer can result from excessive alcohol use. Also, it can raise the chance of accidents and injuries, particularly those brought on

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Answer:

Covalent

Explanation:

Titanium on reaction with chlorine forms Titanium tetra chloride(TiCl4).

Titanium holds strong covalent bond with chlorine in TiCL4

Answer:

These are called cis-but-2-ene (where the groups are on the same side) or trans-but-2-ene (where they are on opposite sides). Cis-but-2-ene is also known as (Z)-but-2-ene; trans-but-2-ene is also known as (E)-but-2-ene. For an explanation of the two ways of naming these two compounds, follow the link in the box below.

Explanation:

Answer:

a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

mass: 9.1093837015 × 10−31 kg

charges: fundamental physical constant expressing the naturally occurring unit of electric charge, equal to 1.602176634 × 10−19 coulomb.

Explanation:

good luck !<3

The mole fraction of each component in the mixture is

a. He   =   0.98

b. \(O_{2}\)    =   0.02

As per the given question,

An 11.0 L Scuba diving tank contains a Helium-Oxygen(heliox) mixture made up of He and \(O_{2}\) at a temperature of 298 K.

⇒ Number of moles of He (\(n_{He}\))   =   mass / molar mass

                                                        =   23.5 / 4 g mole

                                                        =   (23.5/4)(g × mole/g)

                                              \(n_{He}\)    =   5.875 mole

⇒ Number of moles of O2 (\(n_{O_{2} }\))    =   mass / molar mass

                                                        =   4.45 / 32 g mole

                                                        =   (4.45/32)(g × mole/g)

                                               \(n_{O_{2} }\)    =   0.1390625 mole

⇒ Mole fraction of He (\(X_{He}\))   =   \(n_{He} / n_{He}+ n_{O_{2} }\)

                                                  =   5.875 / 5.875 + 0.1390625

                                                  =   5.875 / 6.0140625

                                        \(X_{He}\)    =   0.97687711 ≅ 0.98

⇒ Mole fraction of O2 (\(X_{O_{2} }\))   =   \(n_{O_{2} } / n_{O_{2} } + n_{He}\)

                                                  =   0.1390625 / 0.1390625 + 5.875

                                                  =   0.1390625 / 6.0140625

                                         \(X_{O_{2} }\)   =   0.023122889 ≅ 0.02

Therefore, the mole fraction of He is 0.98 and the mole fraction of \(O_{2}\) is 0.02.

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Answer:

Weak electrolyte

Explanation:

weak bases are ammonia (NH3), methylamine (CH3NH2), and ethylamine (C2H5NH2)

The term that describes the electrolyte capacity of methylamine (CH₃NH₂) which partially dissociates in water is Weak electrolyte.

Because it dissolves in water only partially into ions, methylamine (CH₃NH₂)  is a weak electrolyte. A small amount of electrical current can conduct when certain methylamine molecules split apart into ions CH₃NH₃⁺ and OH⁻ in a solution. Weak electrolytes have a moderate level of electrical conductivity compared to strong electrolytes which almost entirely dissociate into ions and non-electrolytes which do not dissociate.

This is because weak electrolytes exhibit intermediate conductivity due to their partial ionization. Understanding this behavior is crucial for understanding how solutions behave and how weak acids and bases like methylamine, affect chemical reactions.

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Based on the given mole ratio of 1:2 between Al³⁺and C²O⁴²⁻, in the compound was found to be 1 to 2. The tentative formula for the compound is  Al(C²O⁴)3/2.

We can assume that the compound contains one Al³+ ion and two C²O⁴²- ions. To determine the tentative formula, we need to find the chemical formula that contains these ions in this ratio.  First, we need to determine the charges of the ions involved. Al³⁺ has a charge of +3, while C²O⁴²- has a charge of -4. To balance the charges, we need two C²O⁴²- ions for every Al³+ ion, giving us the formula Al²(C²O⁴)3.

However, we need to simplify this formula by dividing all the subscripts by their greatest common factor, which is 2. This gives us the tentative formula Al(C²O⁴)1.5, which we can write as Al(C²O⁴)3/2. Therefore, the tentative formula for the compound with a mole ratio of 1:2 between Al³+ and C²O⁴²- is Al(C²O⁴)3/2.

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Answer:

wow ok ill try to

Explanation:

this is the most beautiful thing ive seen all day

thank you

Answer:

a because it has a 2 and 3 in ot like it says in the question

We have a total of 9.27 moles of the molecule that weights 134.1 g/mol.

The molecular mass of the molecule is 134.7 g/mol.

The amount of the molecule that we have is 1.25kg.

We know,

1 kilogram = 1000 grams.

1.25 kilograms = 1250 grams.

The mass of the amount of molecule we have is 1250 grams.

The moles of a molecule are given by,

Moles = Mass that we have/molecular mass

Putting the values accordingly,

Moles = 1250/134.7

Moles = 9.27 moles.

So, we have 9.27 moles of that molecule whose molecular mass is 134.1 g/mol.

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Answer:

What is the charge of CA?

2+

Table of Common Element Charges

Number Element Charge

17 chlorine 1-

18 argon 0

19 potassium 1+

20 calcium 2+

88 more rows•Dec 24, 2018

Gas pressure can be described as the force exerted per unit area by gas molecules as they collide with the surface of a container. It is a measure of the average kinetic energy of the gas molecules.

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Question:

If butane had a volume of 500 ml. at a pressure of 1.5 atm and a temperature of 20 °C, what would the new volume of the gas be at a temperature of 30 °C and a pressure of 500 Torr?

Solution Given:

Let P be the pressure V be volume and and T be temperature.

Volume of Butane [\(V_1\)] = 500 ml

Pressure of Butane [\(P_1\)] = 1.5 atm

Temperature [\(T_1\)] =20°C=20+273=293K

New Volume of Butane [\(V_2\)] = ?

New Pressure of Butane [\(V_2\)] =500 Torr=500*0.00131579=0.657895 atm

Note: 1 Torr= 0.00131579 atm

New Temperature of Butane [\(V_2\)] =30°C=30+273=303K

Now

By using combined gas law equation:

\(V_2=V_2*\frac{P_1*T_2}{P_2*T_1}\)

\(V_2=500*\frac{1.5*303}{0.657895*293}=1178.9 ml\)

The new volume of Butane is 1178.9 ml

Answer:

Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience intermolecular forces. These forces keep particles close together.

Explanation:

hope it helps U

The initial mass present is 32000 g.

We know that the half life is the time that is taken for only half of the number of the original radioactive atoms to remain. Now, we have been told in the question that the half life of the atom is 1602 years.

Now we have;

N/No = (1/2)^t/\(t_{\frac{1}{2} }\)

N = Number of atoms at time t

No = Number of atoms originally present

t = time taken

\(t_{\frac{1}{2} }\) = Half life of the sample

Now;

500/No = (1/2)^9612/ 1602

500/No =  (1/2)^6

No = 500/(1/2)^6

No = 32000 g

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Since we are going from a larger unit to a smaller unit, we multiply.

So we multiply 1.25 by the conversion factor, which is 1,000.

This gives us 1,250 grams

Orange waves have a lower frequency and contain less energy than green waves.

What is Wave?

A wave is a disturbance or oscillation that travels through space and time, accompanied by the transfer of energy without the transfer of matter. Waves can take many different forms, including sound waves, light waves, water waves, and seismic waves. They can be described in terms of their frequency, wavelength, amplitude, and velocity, among other properties. Waves play a fundamental role in many areas of science and technology, including communication, medicine, and engineering.

The energy of a wave is directly proportional to its frequency, which means that higher frequency waves contain more energy than lower frequency waves. The frequency of a wave refers to the number of complete cycles or oscillations that the wave undergoes per second, and is measured in units of Hertz (Hz).

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Answer:

the sun beams down on the pool and heats it up top to bottom the deeper the colder

Answer:

MgCO3 + 2HCl → MgCl2 + CO2 + H2O

Explanation:

The balanced equation for the reaction of iron with water that results in the production of iron oxide and hydrogen gas is

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

Iron does not react directly with liquid water but react with water vapour. When the reaction happens, it results in the formation of a solid and a gas. The products of the reaction are Iron oxide and hydrogen. The equation of the reaction would be

Fe (s) + H₂O (g) → Fe₃O₄ (s) + H₂ (g)

Now, we need to balance the equation. On the right-hand side, we have 3 Fe, 4 O and 2 H. Similarly on the left-hand side there are 1 Fe, 1 O and 2 H.

To balance the equation, we add 3 to Fe, 4 to H₂0 and 4 to H₂.

As a result, the balanced chemical equation for the reaction would be

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

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Answer:

the third one

Explanation:

Answer:

The law of conservation of mass states that the quantity of the mass can neither be added to, neither can it be removed. The greater picture's mass will always be the same amount.

The repeating monomer unit of polyglycine is simply the amino acid glycine. The chemical structure of glycine is:

H

|

H2N — C — COOH

|

H

The polymerization of glycine involves the condensation of the amino group (-NH2) of one glycine molecule with the carboxyl group (-COOH) of another glycine molecule, releasing a molecule of water (H2O) in the process. The resulting bond is called a peptide bond, and it connects the carbon atom of one glycine molecule to the nitrogen atom of the other glycine molecule.

The repeating monomer unit of polyglycine can be represented as:

H          H          H

|          |          |

H2N — C — CO — NH — C — CO — NH — C — COOH

|                               |

H                               H

Note that the NH group on the left side of the monomer unit represents the amino group of one glycine molecule, and the CO group on the right side represents the carboxyl group of the other glycine molecule. This pattern repeats indefinitely to form the polyglycine polymer.

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