25,963 Answered Questions for the topic chemistry

Chemistry

08/02/23

Concentration in %(w/v) please help how do I solve this?
Five standard solutions of a newly discovered inorganic salt were used to create a calibration curve. The density (g/mL) of each solution was plotted on the y‑axis versus the %(w/v) concentration... more
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Chemistry

08/02/23

Please help urgent!!!
Find the concentration of Hg2+2 in 0.010 M KI saturated with Hg2I2 Include activity coefficients in your solubility-product expression. The 𝐾sp of Hg2I2Hg2⁢I2 is 4.6×10−29 Activity coefficients can... more
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Chemistry

08/02/23

Please help me solve this chemistry question
Find the concentration of I− in 0.010M AgNO3 saturated with AgI. Include activity coefficients in the solubility-product expression. The 𝐾sp of AgI Is 8.3×10−17.use this table for activity... more
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Chemistry

08/01/23

Determining molarity - given grams and volume

What is the molarity of a sodium chloride solution that contains 10.05 g of the solid dissolved in 385 mL of water?
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Chemistry

08/01/23

Process Change - Enthalpy and Entropy Question
Considering the following processes, which would give the greatest increase in both enthalpy and entropy change?Choices include:deposition, sublimation, melting, condensation or vaporization.
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Chemistry

08/01/23

What is the pH with the activities?
Determine the pH of the same solution including activities. Activity coefficients at various ionic strengths can be found in this table.solution contains 0.045M NaOH and 0.025M KII was able to... more
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Chemistry

08/01/23

Please help with this concentration Q
Consider the equilibrium shown.PbBr2(s)↽−−⇀ Pb2+(aq)+2Br−(aq) 𝐾sp=2.10×10−6Determine the concentrations of Pb2+ and Br− in a saturated solution of PbBr2 in pure water (assume 𝜇=0 M)
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Chemistry

08/01/23

Analytical Chemistry Titration(s)
The potential is measured using a Pt indicator electrode (red (+) lead) and a Ag/AgCl reference electrode (black (-) lead) as 50.0 mL of 0.10 M Tl+ is titrated with 0.20 M Co3+ . Predict the... more
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Chemistry

08/01/23

Analytical Chemistry cell voltage with SHE / Saturated Silver/Silver Chloride
A cell voltage measured using a saturated calomel reference electrode is -0.774 V. What would the cell voltage be with a saturated silver/silver chloride reference electrode? With a standard... more
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Chemistry

08/01/23

Analytical Chemistry Cell Potential
A beaker contains a solution of 0.0200 M MnO4 – and 0.00500 M Mn2+ at a pH of 0.0. A second beaker contains 0.150 M Fe2+ and 0.00150 M Fe3+. A salt bridge connects the two beakers, and Pt... more
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Chemistry

08/01/23

Percent yield Chemistry
Liquid hexane CH3CH24CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. If 5.11g of water is produced from the reaction of 7.76g of hexane and 50.3g... more
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Chemistry

07/31/23

Activity Coefficients and pH
What is the activity coefficient of H+ in a solution containing 0.023 lHCl and 0.0090 Ca(ClO4)2? Activity coefficients at various ionic strengths can be found in this table.activity coef. =?pH=?I'm... more
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Chemistry

07/31/23

Concentration using activity coefficients
Find the concentration of I− in 0.010 M AgNO3 saturated with AgI. Include activity coefficients in the solubility-product expression. The 𝐾sp of AgI is 8.3×10^−17what is the concentration of I?
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Chemistry

07/31/23

Chemistry percent yield
Gaseous butane  reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water. If 8.78g of carbon dioxide is produced from the reaction of 11.6g of butane and 65.3g of oxygen... more
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Chemistry

07/31/23

Percent yield in chemistry easy
Aqueous hydrobromic acid HBr reacts with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. If 6.49g of sodium bromide is produced from the reaction of 13.8g... more
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Chemistry

07/31/23

General chemistry question

. A 100.0-mL aliquot of 0.200 M aqueous potassium hydroxide is mixed with 100.0 mL of 0.200 M aqueous magnesium nitrate. a. Write a balanced chemical equation for any reaction that occurs. b. What... more
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Chemistry

07/31/23

Help with this Debye-Huckle question
using the equation i inputted for Zr+4 and got this answer and it was determined to be wrong don't know where I am misunderstanding. on how to determine the activity coefficient.Zr charge +4 size... more
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Chemistry

07/31/23

Which of the following forms a solution with a pH of 1.7?0.5
0.5M solution of HCl0.02M solution of HCl0.02M solution of NaOH0.6M solution of HBr
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Chemistry

07/31/23

Calculate the pH of a 0.035 M sulfuric acid solution
0.891.15 1.46 1.89None of the above
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Chemistry

07/31/23

calculate cell potential
Calculate the cell potential for the galvanic cell in which the given reaction occurs at 25 °C, given... more
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Chemistry

07/30/23

Which reaction will have the highest total entropy
none of thesewater vapor condensinggas undergoing depositionwater freezingwater evaporating
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Chemistry

07/30/23

Wt% Question for NaC2O4
Hello I am struggling to calculate the weight percentage for NaC2O4 inn a precipitate.the molarity of KMnO4 is 0.0290Mvolume of Kmno4 = 25.90mL and molarity of KMnO4 is 0.02153the mass of unknown... more
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Chemistry

07/29/23

help with chem problem
A 0.52970.5297 g mixture of KCNKCN (MW=65.116 g/molMW=65.116 g/mol) and NaCNNaCN (MW=49.005 g/molMW=49.005 g/mol) was dissolved in water. AgNO3AgNO3 was added to the solution, precipitating all of... more
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Chemistry

07/29/23

Analytical Chemistry Q: calculating molarity
Excess (NH4)2SO4= was added to a 55.0 mL solution containing BaCl2 (MW=208.23 g/mol). The resulting BaSO4BaSO4 (MW=233.43 g/mol) precipitate had a mass of 0.2319 g after it was filtered and dried.... more
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Chemistry

07/29/23

Ksp Questions from generic salt
A generic salt, AB, has a molar mass of 155 g/mol and a solubility of 7.40 g/L at 25 °C.AB(s) =" At (ag) + B- (aq)What is the Ksp of this salt at 25 °C?
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