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Chemistry

05/05/23

pH and pOH Question

What information does the pH of a solution give? What equation is used to calculate the pH of a solution? What is the pOH equation? How can pOH be determined from pH? What are the hydrogen... more

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Chemistry

05/05/23

Titrations and Buffers

What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to which 0.100 mol of HCl were added?

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Chemistry

05/05/23

Nernst Equation

What is the value of n in the Nernst equation for the reaction Al(s) + 3 Ag⁺(aq) ⟶ 3 Ag(s) + Al³⁺(aq).

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Chemistry

05/05/23

A. What information does an acid or base equilibrium constant give?B. What is the acid dissociation constant for an acid at equilibrium, HX = H* + X-? C. What is the base dissociation constant for... more

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Chemistry

05/05/23

Equilibrium and kinetics

A. What information does the equilibrium constant give? B. What is the equilibrium constant of aA+bB = cC +dD? C. What does Le Châtelier's principle predict will happen to a system if equilibrium... more

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Chemistry

05/04/23

Chemistry Homework

Compare the concentrations of H+ and OH- for solutions that are acidic, basic, and neutral.

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Chemistry

05/04/23

What amount of heat, in kJ, is required to vaporize 108.30 g of ethanol (C₂H₅OH)? (∆Hvap = 43.3 kJ/mol)

need answer to this question. answer must be in significant figures.

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Chemistry

05/04/23

In a 6.00 L pressure cooker, water is brought to a boil. If the final temperature is 115 degrees Celsius at 4.95 bar, how many moles of steam are in the cooker?(R=0.08314 L x bar/mol x K)

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Chemistry Organic Chemistry

05/04/23

Calculate the pH of a Solution at Each Temperature

Calculate the pH of a 0.0242 M KOH solution at each temperature.T (°C)KwAt 5°C _ Kw = 1.88 x 10–15At 45°C _ Kw = 3.94 x 10–145°C pH=45°C pH=

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Chemistry Organic Chemistry

05/04/23

Calculate the pH of the solution and the concentrations

The 𝐾a of propanoic acid (C2H5COOH) is 1.34×10−5. Calculate the pH of the solution and the concentrations of C2H5COOH and C2H5COO− in a 0.249 M propanoic acid solution at equilibrium.pH=[C2H5COOH]=... more

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Chemistry

05/04/23

If a 0.570 𝑚 aqueous solution freezes at −2.00 ∘C, what is the van't Hoff factor, 𝑖, of the solute?

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Chemistry

05/03/23

Iron-56, ⁵⁶₂₆Fe, has a binding energy per nucleon of 8.79 MeV. (1 MeV = 1.60 × 10⁻¹³ J).

Determine the amount of energy, in J, needed to 'decompose' 1 mol of iron-56 nuclei into the individual nucleons.

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Chemistry

05/03/23

A proton is accelerated to 79.2 MeV per particle. What is this energy in kJ/mol?

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Chemistry

05/03/23

What volume of 2.50 M CH3OH solution is needed to provide 0.326 mol of CH3OH?

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Chemistry

05/03/23

What is the mole fraction of I2 in a solution made by dissolving 63.1 g of I2 in 245 g of hexane, C6H14?

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Chemistry

05/03/23

Chemistry Lab using Hcl and Sodium Bicarbonate to recreate a airbag

I have a 1.12L ziplock bag. I have to combine the proper amount of HCl and NaHCO3 in the bag for a lab to fill the bag enough so that it is plump but will not pop. The temperature of the room will... more

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Chemistry

05/03/23

Chemistry Molarity Problem

What is the molarity of a hydrochloric acid (HCl) solution if 20.0 mL of 0.0952 M sodium hydroxide (NaOH) is needed to neutralize 10.5 mL of the acid solution?

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Chemistry

05/03/23

Chemistry with Solutions and mixtures

A 25.0 mL solution of HBr is neutralized with 16.6 mL of 0.105 M Sr(OH)₂. What is the concentration of the original HBr solution?

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Chemistry

05/02/23

How do you calculate volume or concentration in an Acid base neutralization reaction?

VaSa/VbSb=na/nb. Here, Va=volume of acid, Sa=Concentration of Acid, na=number of moles of acid. similarly Vb=volume of base, Sb=Concentration of baseThe above formula could be useful

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Chemistry Math

05/02/23

Chemistry meets math.... not in my wheelhouse

A chemist has three different acid solutions. The first acid solution contains 25% acid, the second contains 40% and the third contains 60%. He wants to use all three solutions to obtain a mixture... more

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Chemistry Science

05/02/23

Can someone check my answer for this chem question?

Using the slope of the Nernst regression line, use the formula 2.303RT/nF to solve for the Faraday constant.The overall balanced reaction is Zn(s)+Cu2+(aq)--> Zn2+(aq)+Cu (s)The slope is... more

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Chemistry

05/02/23

Henry's Law Question

The solubility of carbon dioxide in water is very low in air (1.05 x 10^-5) because the partial pressure of carbon dioxide in air is only 0.00030 atm. What partial pressure of carbon dioxide is... more

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Chemistry

05/02/23

Chemistry Homework

A 45.0 mL solution of LiOH is neutralized with 35.1 mL of 0.350 M HCl. What is the concentration of the original LiOH solution?

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Chemistry

05/02/23

Chemistry Homework

A 25.0 mL solution of HNO₃ is neutralized with 13.7 mL of 0.125 M Sr(OH)₂. What is the concentration of the original HNO₃ solution

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Chemistry

05/02/23

Chemistry Homework

A 25.0 mL solution of HBr is neutralized with 16.6 mL of 0.105 M Sr(OH)₂. What is the concentration of the original HBr solution?

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Answers •1

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pH and pOH Question

Titrations and Buffers

Nernst Equation

Acids and Bases

Equilibrium and kinetics

Chemistry Homework

What amount of heat, in kJ, is required to vaporize 108.30 g of ethanol (C₂H₅OH)? (∆Hvap = 43.3 kJ/mol)

In a 6.00 L pressure cooker, water is brought to a boil. If the final temperature is 115 degrees Celsius at 4.95 bar, how many moles of steam are in the cooker?(R=0.08314 L x bar/mol x K)

Calculate the pH of a Solution at Each Temperature

Calculate the pH of the solution and the concentrations

If a 0.570 𝑚 aqueous solution freezes at −2.00 ∘C, what is the van't Hoff factor, 𝑖, of the solute?

Iron-56, ⁵⁶₂₆Fe, has a binding energy per nucleon of 8.79 MeV. (1 MeV = 1.60 × 10⁻¹³ J).

A proton is accelerated to 79.2 MeV per particle. What is this energy in kJ/mol?

What volume of 2.50 M CH3OH solution is needed to provide 0.326 mol of CH3OH?

What is the mole fraction of I2 in a solution made by dissolving 63.1 g of I2 in 245 g of hexane, C6H14?

Chemistry Lab using Hcl and Sodium Bicarbonate to recreate a airbag

Chemistry Molarity Problem

Chemistry with Solutions and mixtures

How do you calculate volume or concentration in an Acid base neutralization reaction?

Chemistry meets math.... not in my wheelhouse

Can someone check my answer for this chem question?

Henry's Law Question

Chemistry Homework

Chemistry Homework

Chemistry Homework

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