25,963 Answered Questions for the topic chemistry

Chemistry

04/09/24

Balancing 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.MnO4 -(aq) +Br-(aq) --> MnO2(s) + BrO3 -(aq)
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Chemistry

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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Chemistry

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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Chemistry

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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Chemistry

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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Chemistry

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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Chemistry

04/08/24

apply to tutoring
Please send me a link so I can apply and become a tutor.
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Chemistry

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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Chemistry

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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Chemistry

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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Chemistry

04/07/24

chemistry partial pressures
A(n) 972 mL sample of hydrogen was collected over water at 21.0◦C on a day when the barometric pressure was 757 torr. What volume would the dry hydrogen occupy under standard conditions? The vapor... more
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Chemistry

04/06/24

Sign up for tutoring!
Hello,I'd like to sign up and become a tutor but cannot find a link to do so. Could you please help.Thank you,Abbass Kamalizad
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Chemistry

04/06/24

What is the concentration of lithium ions in 0.460 M Li₂HPO₄?
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Chemistry

04/05/24

See below Nutrient concentration

How many ounces of triple superphosphate are required per 100 gallons of pure water to arrive at a concentration of one part per million ( ppm ) ? For 48% P205
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Chemistry

04/05/24

Determine the Half reactions for oxidation and reduction of carbon
Balance the following half-reaction showing the oxidation of carbon:CH4​(g)CO2​(g)Balance the following half-reaction showing the reduction of oxygen: O2​(g)H2​O(g)
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Chemistry

04/05/24

How much 10.0 M HNO3 must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the pH to 4.60 ?
How much 10.0 M  HNO3 must be added to 1.00 L of a buffer that is 0.0100 M  acetic acid and 0.100 M  sodium acetate to reduce the pH to 4.60 ?
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Chemistry

04/05/24

Write a balanced chemical equation for the equilibrium reaction occurring in a buffer containing NH3 and NH4Cl. Write the equation so that its equilibrium constant is equivalent to Ka.
Write a balanced chemical equation for the equilibrium reaction occurring in a buffer containing NH3 and NH4Cl. Write the equation so that its equilibrium constant is equivalent to Ka.
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Chemistry

04/05/24

What is the pH at the equivalence point when 95.0 mL of a 0.175 M solution of acetic acid (CH3COOH) is titrated with 0.100 M NaOH to its end point?
What is the pH at the equivalence point when 95.0 mL of a 0.175 M  solution of acetic acid (CH3COOH) is titrated with 0.100 M  NaOH to its end point?
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Chemistry

04/05/24

25.0 mL of 0.275 M HNO2 is titrated to its equivalence point with 1.00 M NaOH. What is the pH at the equivalence point?
25.0 mL of 0.275 M  HNO2 is titrated to its equivalence point with 1.00 M  NaOH. What is the pH at the equivalence point?
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Chemistry

04/05/24

How many moles of HNO2 and NaNO2 remain in solution after addition of the HCl?
1.00 mL of 12.0 M HCl is added to 1.00 L of a buffer that contains  0.130 M HNO2 and 0.200 M NaNO2. How many moles of HNO2 and NaNO2 remain in solution after addition of the HCl?___ mol HNO2... more
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Chemistry

04/05/24

What volume of 1.57 M HCl must be added to 0.240 L of 0.213 M dimethylamine to produce a buffer with a pH of 10.53?
An acid–base buffer is a solution that contains a weak acid and its conjugate base. A buffer solution may be prepared by dissolving a weak base and then adding strong acid to obtain a buffer with... more
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Chemistry

04/05/24

Calculate the pH at 25°C of 199.0 mL of a buffer solution that is 0.210 M NH4Cl and 0.210 M NH3 before and after the addition of 1.80 mL of 6.0 M HNO3. (The pKa for NH4+ = 9.75)
Calculate the pH at 25°C of 199.0 mL of a buffer solution that is 0.210 M  NH4Cl and 0.210 M  NH3 before and after the addition of 1.80 mL of 6.0 M  HNO3. (The pKa for NH4+ = 9.75)pH before = pH... more
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Chemistry

04/05/24

What is the pH of a solution that results from mixing together equal volumes of a 0.060 M solution of ammonia and a 0.030 M solution of hydrochloric acid? (pKa of NH4+ = 9.25)
What is the pH of a solution that results from mixing together equal volumes of a 0.060 M  solution of ammonia and a 0.030 M  solution of hydrochloric acid? (pKa of NH4+ = 9.25)
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Chemistry

04/05/24

gas law tutorial boyle
alculate the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L
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Chemistry

04/05/24

How many moles of NaOH are needed to neutralize 1.80 grams of KHP
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