11/11/21

Redox Balancing Rxn.
Balance the redox reaction. Indicate the reducing agent and the oxidizing agent for each reaction.V2+ + V(OH)4+ → VO2+ (basic)
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11/11/21

chemistry homework
How many moles of potassium chloride are needed to precipitate all the lead(II) ion from 14.0 mL of a 0.350 M lead(II) nitrate solution?
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11/11/21

Consider the reaction: H2 + Cl2 → 2 HCl. How many grams of HCl would be produced from 0.627 mol of Cl2?
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11/11/21

Estimate the number of oxygen atoms contained in the amount of oxygen gas that forms when 58.6 g of KNO3 decomposes according to the following chemical equation:
Estimate the number of oxygen atoms contained in the amount of oxygen gas that forms when 58.6 g of KNO3 decomposes according to the following chemical equation:a) 5.58 × 10^23 atoms b) 4.36 ×... more
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11/11/21

Consider the reaction described by the chemical equation below.
Consider the reaction described by the chemical equation below. Estimate the minimum amount (in grams) of TiCl4 needed to produce 132 millimoles of MgCl2. 2 Mg + TiCl4 → Ti + 2 MgCl2 a) 6.26 g b)... more
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11/10/21

Can someone please help me with these two Chemistry problems?
 In the reaction 2Mg (s) + O2 (g) + 2H2O (l) → 2Mg2+ (aq) + 4OH– (aq), which substance is reduced?A. MgB. OC. H2OD. OHE. None of the Above (This is not a redox reaction.)In the reaction 2H2O (l) +... more
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11/10/21

How many seconds will it take to plate 6.46 g of silver metal from a solution of Ag+ using a current of 18.4 amps in an electrolyte cell?
1 A = 1 C/sandF = 96,485 C/mol
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11/10/21

Help with this Chem Question
Hydrogen gas can be collected from the reaction of a metal element with a strong acid asshown. When a 500.0 mg iron metal sample was soaked in 50.00 mL 0.500 M HNO3, 16.00 mg H2was collected. How... more
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11/10/21

Calorimetry Question
When 10.0 mL 0.100 M NaOH and 5.00 mL 0.200 M HCl were mixed in a coffee-cupcalorimeter (heat capacity = 46.5 J °C-1), the temperature increased by 1.20°C. Determine thechange in enthalpy of the... more
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11/10/21

AP chem question
How many moles of magnesium oxide are produced by the reaction of 3.82 g of magnesium nitride with 7.73g of water?Mg3N2 + 3H2O -> 2NH3 + 3MgOa) 0.114b) 0.0378c) 0.429d) 0.0756e) 4.57can someone... more
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11/10/21

Help with this Chemistry Question
Hydrogen gas can be collected from the reaction of a metal element with a strong acid asshown. When a 500.0 mg iron metal sample was soaked in 50.00 mL 0.500 M HNO3, 16.00 mg H2was collected. How... more
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11/10/21

Assistance with Chemistry Question
When 10.0 mL 0.100 M NaOH and 5.00 mL 0.200 M HCl were mixed in a coffee-cupcalorimeter (heat capacity = 46.5 J °C-1), the temperature increased by 1.20°C. Determine thechange in enthalpy of the... more
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11/10/21

Question about Chemistry
What is the change in internal energy of a system if the surroundings absorb 145 J of heatfrom the system while doing 98 J of work on the system?
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11/10/21

Calculate How Many Photons Produced
The energy is 5,500,000 Jfrequency is 824 Megahertzwavelength of 36.4 m
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11/09/21

When a redox reaction occurs, there will always be _______.
A. at least one atom that is oxidizedB. at least one atom that is reducedC. at least one electron that is transferredD. All of the AboveE. None of the Above
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11/09/21

Can someone please check-over my Chemistry homework?
In the reaction 2Mg (s) + O2 (g) + 2H2O (l) → 2Mg2+ (aq) + 4OH– (aq), which substance is oxidized?A. MgB. OC. H2OD. OHE. None of the Above (This is not a redox reaction.) In the reaction 2Mg (s) +... more
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11/09/21

A 115-g sample of steam at 100 °C is emitted from a volcano. It condenses, cools, and falls as snow at 0.0 °C. How many kilojoules were released? (3.6, 3.7)
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11/09/21

Chemistry Homework
A student titrates 2.025 g of vinegar with 0.121 M NaOH. It takes 14.01 mL of NaOH to reach endpoint. What is the mass percent acetic acid in the vinegar sample? Show your calculations below. 
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11/09/21

A galvanic cell is prepared according to the redox reaction shown below. A voltmeter connected to this galvanic cell under standard conditions reads 0.25 V, and delta G of reaction= −44 kJ/mol. 
A galvanic cell is prepared according to the redox reaction shown below. A voltmeter connected to this galvanic cell under standard conditions reads 0.25 V, and delta G of reaction= −44 kJ/mol. If... more
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11/09/21

Suppose the molar solubility of Ag2CrO4 in water is x M, while its molar solubility in a 0.005 M solution of Na2CrO4 is y M. Which of the following is correct?
Suppose the molar solubility of Ag2CrO4 in water is x M, while its molar solubility in a 0.005 M solution of Na2CrO4 is y M. Which of the following is correct?  It can't be determined.  x > y  x... more
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11/09/21

The potential generated by the cell when the concentration of Ni2+ is 0.126 M and the concentration of Zn2+is 0.0169 M is

The standard potential for the cell using the overall cell reaction below is +0.48 V: Zn (s) + Ni2+ (aq) → Zn2+ (aq) + Ni (s)Enter answer as decimal format with 3 decimals.
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11/09/21

The cell potential for this reaction is ________ V when the Zn2+ concentration is 2.73 M and the Pb2+concentration is 0.001043 M at 298 K.
The standard cell potential (E°cell) for the reaction below is +0.63 V. Pb2+ (aq) + Zn (s) → Zn2+ (aq) + Pb (s)(Enter your answer in decimal format using 3 decimals)
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11/09/21

The cell potential for this reaction is ________ V when the Zn2+ concentration is 2.73 M and the Pb2+concentration is 0.001043 M at 298 K.
The standard cell potential (E°cell) for the reaction below is +0.63 V. Pb2+ (aq) + Zn (s) → Zn2+ (aq) + Pb (s) 
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11/09/21

Use the standard half-cell potentials listed below to calculate the standard Gibbs energy (in kJ) for the following reaction occurring in an electrochemical cell at 25°C and 1 atm.
(The equation is balanced.)6 Cl⁻(aq) + 2 Fe3+(aq) → 3 Cl2(g) + 2 Fe(s) Cl2(g) + 2 e⁻ → 2 Cl⁻(aq) E° = +1.36 VFe3+(aq) + 3 e⁻ → Fe(s) E° = -0.04 V 
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11/09/21

Chemistry questions

answer each question for Mn (element #25).(0.5 points) 2. (a) Write out the equation that corresponds to the 8th ionization. Include phases. You do not need to include the ionization energy. (0.5... more
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