Michael S.

07/15/22

Dissociation of a Complete Ion

Calculate the silver ion concentration, [Ag+], of a solution prepared by dissolving 1.00 g of AgNO3 and 10.0 g of KCN in sufficient water to make 1.00 L of solution. (Hint: Because Kf is very... more

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Chemistry

07/15/22

Electrolyte Testing Type of Electrolyte Solution/Substance Observations (Strong, Weak, or Non)

Electrolyte Testing Type of Electrolyte Solution/Substance Observations (Strong, Weak, or Non) Isopropyl Alcohol - NON0.1 M HCI - STRONG 0.1 M NaOH - STRONG0.1 M CaCL2 - STRONG 0.1 M HC2H3O2 - WEAK... more

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Chemistry

07/14/22

Chemistry 102: Acid Equilibrium: Find cnc of solution

8). A 1.00-L solution contains 2.75×10-4 M Cu(NO3)2 and 1.80×10-3 M ethylenediamine (en). The Kf for Cu(en)22+ is 1.00 × 1020.Cu2+(aq)+2en(aq)Cu(en)2+2(aq)Kf=[Cu(en)2+2][Cu2+][en]2What is the... more

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Chemistry

07/11/22

Chemistry 102: Acids: Draw Lewis Structure for phosphoric acid that is consistent with the following behavior

13.The value of Ka1 of hypophosphorous acid, H3PO2, is nearly the same as the Ka1 of phosphoric acid, H3PO4. Draw a Lewis structure for phosphoric acid that is consistent with this behavior.Draw... more

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Chemistry

07/09/22

Methange gas (CH4) is expected to sink in air (Dair = 1.29 g/L at STP)

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Chemistry

06/17/22

100cm3 buffer solution of 0.1M CH3COOH and 0.05M CH3COONa are added 3cm3 HCl 0.01M. Ph =?

I'm having trouble!

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Chemistry

05/13/22

Maximum number of unpaired electrons

What is the maximum number of unpaired electrons possible in an octahedral complex?

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Chemistry

05/08/22

Calculate the ∆G, in kJ/mol, for the reaction at 298 K if the partial pressure of ICl(g) is 0.0780 atm and the partial pressure of Cl₂(g) is 0.00100 atm.

Consider the reaction: ICl(g) + Cl₂(g) → ICl₃(s). The ∆G° of the reaction is -17.09 kJ/mol. Calculate the ∆G, in kJ/mol, for the reaction at 298 K if the partial pressure of ICl(g) is 0.0780 atm... more

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Chemistry

04/26/22

A 4.7 % % ( m/v m / v ) glucose solution prepared from 77 mL m L of a 12% ( m/v m / v ) glucose solution

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Chemistry

04/24/22

In a particular redox reaction, Cr is oxidized to CrO2−4 and Cu2+ is reduced to Cu+ . Complete and balance the equation for this reaction in acidic solution. Phases are optional.

balanced redox reaction: Cr+Cu2+⟶CrO24+Cu+

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Chemistry

04/22/22

Determining Reaction Spontaneity

Does the reaction P4(s, white) + 5 O2(g) P4O10(s) occur spontaneously at 298 K and standard state conditions?Calculate the value of S°univ.

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Chemistry

04/09/22

Chem 212 Finding Qsp and Ksp

Does any solid Ag2CrO4 form when 7.0 10-5 g of AgNO3 is dissolved in 15 mL of 4.7 10-3 M K2CrO4? Assume no volume change. Yes, precipitate will form.No, precipitate will not... more

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Chemistry

04/08/22

Write the balanced chemical equation associated with the formation constant, 𝐾f , for each complex ion. Include phase symbols. AgI−2 : ↽−−⇀ Hg(NH3)2+4 : ↽−−⇀

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Math Chemistry Statistics

04/07/22

Statistics relaitve error and calibration error

Obsidian or what others call ‘dragon glass’ is said to contain trace analysis of Iridium. Based from extensive previous trace analysis of Ir of obsidian samples by Aemon, it was found out that the... more

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Chemistry

04/05/22

Chemistry concentration

Calculate the concentration of free Ca2+ in a solution in which 25.00 mL of 0.1500 M Ca2+ has been titrated with 25.00 mL of 0.1500 M EDTA4-. The Kr for the formation of the calcium/EDTA complex is... more

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Chemistry

04/05/22

Chemistry concentration

Analysis of iron in water from farm runoff was determined according to the following. A 25.0 mL sample of the runoff was acidified and then treated with excess KSCN to form a red complex. This... more

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Chemistry

04/04/22

What are the three processes that must occur within a photovoltaic material in order for an electrical current to be produced in an external circuit?

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Chemistry Chemical Kinetics Rate Of Reaction

04/03/22

Identify the factor that affect the rate of reaction on the following situations:

Cooked food must be stored in a refrigerator. Labels on most medicines indicate that they should be stored in a cool, dark place. Various jewelries are made using silver, copper, and gold, not by... more

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Chemistry

04/01/22

Calculate the enthalpy of combustion △Hcomb for each of propane and octane. Express your answer in KJ/mol of the fuel

To begin to answer the above question, work in small groups to consider the following information. Also consider additional data that are needed to answer the question. Refer to Appendix B as... more

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Chemistry

03/29/22

A galvanic (voltaic) cell consists of an inert platinum electrode in a solution containing 1.0 M tin(IV) ion and 1.0 M tin(II) ion,

and another inert platinum electrode in a solution containing 1.0 M cobalt(III) ion and 1.0 M cobalt(II) ion, connected by a salt bridge. Calculate the standard potential for this cell at ... more

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Chemistry

03/02/22

A sample of 72.1g of P4O10 reacts with 50.3g of H2O to make H3PO4. A)Determine the limiting reaction. B)Find mass of H3PO4 made. C)find %yield of H3PO4 if 37.3g is isolated

P4O10 +6H2O = 4H3PO4 The sample P4O10 is Tetra phosphorous Dec oxide

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Chemistry

03/02/22

Suppose you have Avogadro's number of mini marshmallows and use them to cover the state of Alaska...... description

Suppose you have Avogadro's number of mini marshmallows and use them to cover the state of Alaska which has a land area of 5.720 x 10^5 mi^2. Each mini marshmallow has a diameter of 0.635cm and a... more

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Chemistry

03/02/22

find the reaction for Co(s)+Cl2(g)⟶

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Chemistry

03/02/22

find the reaction for K(s)+Cl2(g)⟶

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Chemistry

03/01/22

Which of the following will not result in a chemical change?

F.Lithium atoms combining with chlorine atoms to form LiCl. G.Beryllium atoms combining with chlorine atoms to form BeCl2. H.Gold atoms combining with copper atoms to form AuCu. J.Hydrogen atoms... more

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Dissociation of a Complete Ion

Electrolyte Testing Type of Electrolyte Solution/Substance Observations (Strong, Weak, or Non)

Chemistry 102: Acid Equilibrium: Find cnc of solution

Chemistry 102: Acids: Draw Lewis Structure for phosphoric acid that is consistent with the following behavior

Methange gas (CH4) is expected to sink in air (Dair = 1.29 g/L at STP)

100cm3 buffer solution of 0.1M CH3COOH and 0.05M CH3COONa are added 3cm3 HCl 0.01M. Ph =?

Maximum number of unpaired electrons

Calculate the ∆G, in kJ/mol, for the reaction at 298 K if the partial pressure of ICl(g) is 0.0780 atm and the partial pressure of Cl₂(g) is 0.00100 atm.

A 4.7 % % ( m/v m / v ) glucose solution prepared from 77 mL m L of a 12% ( m/v m / v ) glucose solution

In a particular redox reaction, Cr is oxidized to CrO2−4 and Cu2+ is reduced to Cu+ . Complete and balance the equation for this reaction in acidic solution. Phases are optional.

Determining Reaction Spontaneity

Chem 212 Finding Qsp and Ksp

Write the balanced chemical equation associated with the formation constant, 𝐾f , for each complex ion. Include phase symbols. AgI−2 : ↽−−⇀ Hg(NH3)2+4 : ↽−−⇀

Statistics relaitve error and calibration error

Chemistry concentration

Chemistry concentration

What are the three processes that must occur within a photovoltaic material in order for an electrical current to be produced in an external circuit?

Identify the factor that affect the rate of reaction on the following situations:

Calculate the enthalpy of combustion △Hcomb for each of propane and octane. Express your answer in KJ/mol of the fuel

A galvanic (voltaic) cell consists of an inert platinum electrode in a solution containing 1.0 M tin(IV) ion and 1.0 M tin(II) ion,

A sample of 72.1g of P4O10 reacts with 50.3g of H2O to make H3PO4. A)Determine the limiting reaction. B)Find mass of H3PO4 made. C)find %yield of H3PO4 if 37.3g is isolated

Suppose you have Avogadro's number of mini marshmallows and use them to cover the state of Alaska...... description

find the reaction for Co(s)+Cl2(g)⟶

find the reaction for K(s)+Cl2(g)⟶

Which of the following will not result in a chemical change?

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