Newest chemistry Questions | Wyzant Ask An Expert

03/23/24

Carboxylic Acids

If a formic acid in formate buffer is 0.023 M in formic acid and has a pH of 4.07, what is the molar concentration of the formate ion? The pKa of formic acid is 3.75.

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Chemistry

03/23/24

Determine the volume of strontium hydroxide that needs to be added to create a buffer.

Determine the volume (in mL) of 0.230 M strontium hydroxide (Sr(OH)2) that must be added to 83.9 mL of 0.0920 M sodium hydrogen sulfite (NaHSO3) to yield a pH of 6.81.pKa of HSO3 is 7.19 and assume... more

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Chemistry

03/23/24

What is the value of ΔGrxn? (ΔGºrxn = 41.90 kJ)

The partial pressures of N2, H2, and NH3 were measured as 0.603, 1.00, and 0.0100 atm, respectively, in the reaction shown below. Temperature is 650 K.What is the value of ΔGrxn? (ΔGºrxn = 41.90... more

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Chemistry

03/23/24

Making CO from CO2 is a potential energy source. The value of Kp for the reaction is is 1.50 at 700.0°C.

Making CO from CO2 is a potential energy source. The value of Kp for the reaction is is 1.50 at 700.0°C.CO2(g)+C(s)2CO(g)a. Calculate the equilibrium partial pressure of CO if initially... more

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Chemistry

03/23/24

Calculate the pH of a 3.92×10-3 M solution of NaF, given that the Ka of HF = 6.80 x 10-4 at 25°C.

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Chemistry

03/23/24

What is the pH of a 0.300 M solution of sodium acetate?

The acetate ion is the conjugate base of acetic acid. The Ka of acetic acid is 1.76×10–5.What is the pH of a 0.300 M solution of sodium acetate?

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Chemistry

03/22/24

Osmotic Pressure

What is the molarity of an aqueous solution of C6H12O6 that has an osmotic pressure of 115 mmHg at 19oC? Answer with 3 decimal places.

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Chemistry

03/22/24

Determine the pH of a solution.

Determine the pH of the solution after the addition of 549 mL of 0.158 M strontium hydroxide (Sr(OH)2) to 786 mL of 0.919 M benzoic acid (C6H5COOH).Assume that the volumes are additive and that the... more

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Chemistry

03/21/24

What is the pH of the resulting solution?

A solution is made by dissolving 0.06600 moles of Ba(OH)2 in enough water to make 260.0 mL of solution. What is the pH of the resulting solution?

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Chemistry

03/21/24

Calculate the pH of a 3.40×10-4 M solution of codeine if the pKa of the conjugate acid is 8.21.

Codeine is a popular prescription pain killer because it is much less addictive than morphine. Codeine contains a basic nitrogen atom that can be protonated to give the conjugate acid of codeine.... more

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Chemistry

03/21/24

At equilibrium, the value of [H+] in a 0.260M solution of an unknown acid is 0.00404M . Determine the degree of ionization and the Ka of this acid.

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Chemistry

03/21/24

What is the total pressure in the container after equilibrium has been established?

A large amount of solid ammonium carbamate is placed in a rigid container at 25.05 °C and allowed to come to equilibrium. What is the total pressure in the container after equilibrium has been... more

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Chemistry

03/21/24

Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contained 0.900 atm N2 and 0.500 atm H2 at 648 K.

Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contained 0.900 atm N2 and 0.500 atm H2 at 648 K.The value of Kp for the reaction below is 4.30 × 10–4 at 648... more

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Chemistry

03/21/24

Calculate the pH of a 0.200 M HCN solution.

Calculate the pH of a 0.200 M HCN solution. The Ka value of HCN is Ka= 6.20 ×10–10

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Chemistry

03/20/24

what volume in liters of CH3OH gas forms when 3.20 L of H2 gas are completely reacted at STP according to the following chemical reaction?

Remember 1 mol of an ideal gas has a volume of 22.4 L at STP. CO(g)+2H2(g)->CH3OH(g)please show equation not just the answer!

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Chemistry

03/20/24

If 20.9 L of nitrogen at 742 mm Hg are compressed to 844 mm Hg at constant temperature. What is the new volume in liters

and if u could show me how to do the formula too please

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Chemistry

03/19/24

How many moles of hydrogen, H2, are needed to react with 2.75 moles of nitrogen, N2? 5.75 moles N2

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Chemistry

03/19/24

How many moles of hydrogen, H2, are needed to react with 2.75 moles of nitrogen, N2? 5.75 moles N2

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Chemistry

03/19/24

I NEED HELP PLEASE

Liquid octane CH3CH26CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 27. g of octane is mixed with 46.1 g of oxygen. Calculate the minimum... more

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Chemistry Sign Language

03/19/24

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Chemistry

03/19/24

Chemistry enthalpy

How many moles of isooctane must be burned to produce 100 kJ of heat under standard state conditions?

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Chemistry

03/19/24

The Ksp of PbBr2 is 6.60 x 10^-6. What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution?

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Chemistry

03/17/24

acid-base titration

Determine the number of moles of the listed first substance that would be the chemically equivalent amount of the second substance for each of these acid-base titration combinations:Carbonous acid... more

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Chemistry English Writing Networking (computer)

03/17/24

Simple Ai Calc Customer CAre Number 91×8629964274(☎️)08629964274/Contact

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Chemistry English Microsoft Excel

03/17/24

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Carboxylic Acids

Determine the volume of strontium hydroxide that needs to be added to create a buffer.

What is the value of ΔGrxn? (ΔGºrxn = 41.90 kJ)

Making CO from CO2 is a potential energy source. The value of Kp for the reaction is is 1.50 at 700.0°C.

Calculate the pH of a 3.92×10-3 M solution of NaF, given that the Ka of HF = 6.80 x 10-4 at 25°C.

What is the pH of a 0.300 M solution of sodium acetate?

Osmotic Pressure

Determine the pH of a solution.

What is the pH of the resulting solution?

Calculate the pH of a 3.40×10-4 M solution of codeine if the pKa of the conjugate acid is 8.21.

At equilibrium, the value of [H+] in a 0.260M solution of an unknown acid is 0.00404M . Determine the degree of ionization and the Ka of this acid.

What is the total pressure in the container after equilibrium has been established?

Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contained 0.900 atm N2 and 0.500 atm H2 at 648 K.

Calculate the pH of a 0.200 M HCN solution.

what volume in liters of CH3OH gas forms when 3.20 L of H2 gas are completely reacted at STP according to the following chemical reaction?

If 20.9 L of nitrogen at 742 mm Hg are compressed to 844 mm Hg at constant temperature. What is the new volume in liters

How many moles of hydrogen, H2, are needed to react with 2.75 moles of nitrogen, N2? 5.75 moles N2

How many moles of hydrogen, H2, are needed to react with 2.75 moles of nitrogen, N2? 5.75 moles N2

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Chemistry enthalpy

The Ksp of PbBr2 is 6.60 x 10^-6. What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution?

acid-base titration

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