04/18/24

Write a balanced net ionic equation for the redox reaction of Ag2S and Al metal that produces Ag metal and Al(OH)3.

Write a balanced net ionic equation for the redox reaction of Ag2S and Al metal that produces Ag metal and Al(OH)3. Low concentrations of hydrogen sulfide in air react with silver to form Ag2S,... more
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04/18/24

What is the value of Ecell for this reaction when [Fe3+] = [Cu+] = 1.50 × 10–3 M and [Fe2+] = [Cu2+] = 2.50 × 10–4 M?

What is the value of Ecell for this reaction when [Fe3+] = [Cu+] = 1.50 × 10–3 M and [Fe2+] = [Cu2+] = 2.50 × 10–4 M? Consider an electrochemical cell based on the following... more
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04/17/24

Complete and balance the following half-reaction in acidic solution. H2SO3(aq) -> SO4 2- (aq)
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04/17/24

what is the pH of the buffer?
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 0.060 mol of NaOH were added?
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04/17/24

Struggling on these 3 questions for chem and need help?
The Ksp Of lanthanum iodate, La(IO3)3, is 7.50 × 10^-12. Calculate the molar solubility, x, of this compound. Answer in M. A solution contains 0.0460 M Ca^2+ and 0.0910 M Ag^+. When the second... more
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04/16/24

Calculate the amount of americium-241
Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a smoke detector (initially containing 5.0000 µg of Am), in micrograms, that has been used for... more
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04/12/24

How to find the percent by mass

I need to find the percent by mass of H2O2 in a solution of KMnO4. To do so, I need to know how many moles of H2O2 reacted in the titration to do my calculation (mass of H2O2 reacting/ mass of H2O2... more
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04/11/24

What is S° for A in the reaction 3 A → 2 B if ∆S°(rxn) =-147.3 J/mol ･ K? [S° (B) = (240.0 J/mol ･K)]
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04/11/24

Write the net ionic equation for the cell reaction:
A lead–acid automotive battery consists of voltaic cells in series. The cathode of each cell consists of lead(IV) oxide (PbO2) packed in a metal grid. The anode of each cell is composed of lead.... more
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04/10/24

The Solubility Product Constant for zinc phosphate is 9.1x10^-33 . The maximum amount of zinc phosphate that will dissolve in a 0.118 M zinc acetate solution is ___ M.
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04/10/24

Solid sodium fluoride is slowly added to 150 mL of a barium nitrate solution until the concentration of fluoride ion is 0.0479 M. The maximum amount of barium ion remaining in solution is _____ M
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04/10/24

Dilutions in an assay

HelloI'm confused on why we have to dilute our samples? like what is the purpose other than making sure its in the range of a spectrometer? How do dilutions help us find the concentration of... more
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04/10/24

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 0.070 mol of HCl were added?
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 0.070 mol of HCl were added?
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04/10/24

Thermochemistry problem

A 75g piece of metal is removed from a pot of boiling water and placed into a calorimeter with 100mL of water that has an initial temperature of 20.8°C. After the metal is put in the water, the new... more
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04/10/24

Heat of formation
If the heat of combustion of benzene is -3267.6 kJ/mol and the delta H for CO2 is -393.5 kJ/mol with the delta H for H20 being -285.8 kJ/mol, find the heat of formation of benzene, C6H6.
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04/10/24

What is the molar mass of a sample of gas that has the density of 1.55g/L at 1.45 atm pressure and 25.0°C?
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04/10/24

Determine how many liters 8.47g of carbon dioxide gas would occupy at the following conditions.
STP140°C and 5.00 atm239K and 109 laps
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04/09/24

Balanicng Redox Reactions
Complete and balance the following redox reaction in basic solution. Be sure to include the proper phases for all species within the reaction.Cr2O7 2-(aq)+I2(s) --> Cr3+(aq)+IO3 -(aq)
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04/09/24

Balancing Redox Reactions
Complete and balance the following redox reaction in acidic solution. Be sure to include the proper phases for all species within the reaction.MnO4 -(aq)+S2O3 2-(aq) --> S4)6 2-(aq)+Mn 2+(aq)
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04/09/24

Balancing Redox Reactions
Complete and balance the following redox reaction in acidic solution. Be sure to include the proper phases for all species within the reaction. Cr2O7 2-(aq)+Pb2+(aq) --> Cr3+(aq)+PbO2(s)
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04/09/24

Balancing Redox Reactions
Complete and balance the following half-reaction in basic solution. Be sure to include the proper phases for all species within the reaction.Zn(s) --> Zn(OH)4 2-(aq)
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04/09/24

look in description
A voltaic cell consists of Cu²⁺/Cu and Cd²⁺/Cd half-cells. Each compartment has a volume of 0.500 L with the following initial concentrations: [Cu²⁺] = 1.250 M; [Cd²⁺] = 0.250 M at 25.0 °C. What is... more
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04/08/24

Chemistry class work
How many grams of COz will be produced when 6.25 mol of ZnO reacts according to the following equation? Your work must show a balanced equation and the work for calculating the correct answer.C +... more
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04/07/24

Determine the ΔE of an electrochemical cell.
Determine ΔE (in V) for an electrochemical cell at 16.39 °C composed of a Zn electrode in a solution of 0.0331 M Zn2+ coupled to a Zn electrode in a solution of 0.666 M Zn2+.Zn2+(aq) + 2e− ⇌... more
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04/07/24

Calculate the E°cell for the following equation. Using the standard potentials
ClO-4(aq)+6H3O+(aq)+6Br-(aq) = 3Br2(aq)+ClO-(aq)+9H2O(l)
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