J.R. S.

The balanced combustion reaction for C6 H6 is2 C6 H6 (l) + 15 O2 (g)---> 12 CO2 (g) + 6 H2O(l) + 6542 kJIf 7.100 g C6H6 is burned and the heat produced from the burning is added to 5691 g of... more

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Chemistry

03/23/22

How much heat is absorbed when 18.3g of KCl decomposes to K and Cl2 Show the conversions required to solve this problem.

How much heat is absorbed when 18.3g of KCl decomposes to K and Cl2 Show the conversions required to solve this problem.2KCl(s) --> 2K(s) +Cl2(g) Δ𝐻=873 kJ18.3 g KCl x(--------)... more

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Chemistry

03/23/22

what is the scientific standard notation for 4.3*10^-1

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Math Chemistry

03/23/22

If [H3O+] = 7.4x10-4M, what is the pH of the solution? Report your answer to 2 decimal places.

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Chemistry Thermochemical Equation

03/23/22

Calculate the heat evolved when 355 g of octane burns

Octane a major component of gasoline, burns according to the reaction: 2C8H18(l) + 25O2(g) ----------> 16 CO2(g) + 18H2O(g) ^H = -1.10 x 10^4 kJ Calculate the heat evolved when 355 g of octane... more

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Chemistry Thermochemical Equation

03/23/22

Find the amount of heat given off from the combustion of 323.2 g CH3OH

Methanol undergoes combustion according to the equation: 2CH3OH(l) + 3O2(g) ----------> 2CO2(g) + 4H2O(l) ^H = -1,452.8 kJ Find the amount of heat given off from the combustion of 323.2 g... more

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Science Chemistry Biochemistry

03/23/22

What volume of the solution would produce 0.287 g of AgCl if 26 ml of a HCl solution required 26.25 ml of 0.095 N NaOH in titration?

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Science Chemistry Biochemistry

03/23/22

If a 0.250 g sample of zinc oxide (95%) was treated with 50 ml of 1.123 N sulfuric acid,

what volume of 0.977 N sodium hydroxide would be required in the residual titration?

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Science Chemistry Biochemistry

03/23/22

A 4.0520 g sample of hydrochloric acid, sp gr 1.18, required 44.15 ml of 0.9035 N sodium hydroxide in a titration.

Calculate the HCl content in %

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Chemistry Solutions Order Of Precipitations

03/23/22

A solution is 1.0x10-4 M in NaF, Na2S, and Na3PO4. What would be the order of precipitation as a source of Pb2+ is added gradually to the solution? Assume negligible volume change.

Given: Ksp of PbF2= 4.0x10-8, Ksp of PbS= 7.0x10-29, Ksp of Pb3(PO4)2= 1.0x10-54 .Show your complete solutions.

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Chemistry

03/22/22

At what temperature will 0.82 mol Cl2 exert a pressure of 1.78 atm at a volume of 2.71 L?

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Math Chemistry

03/22/22

If the measured pH of an aqueous solution is 2.96, what is [H3O+]? Report your result to 5 decimal places.

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Science Chemistry Henderson Hasselbalch equation

03/22/22

Use the Henderson-Hasselbalch equation to perform the following calculations.

Use the Henderson-Hasselbalch equation to perform the following calculations.The Ka of acetic acid is: 1.8 × 10–5. FW for sodium acetate, trihydrate (NaC2H3O2•3H2O) is 136.08 g/mol.• Buffer... more

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Chemistry

03/22/22

Stoichiometry and chemical reactions

How many grams of carbon dioxide, CO2 will be liberated when 35.0 grams of propane (C3H8) is burned with excess amount of oxygen, O2? (Molar mass of C=12.01 g/mol, H=1.01 g/mol, O=16.00 g/mol)C3H8... more

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Chemistry

03/22/22

In which of the solutions will Lead sulfate, PbSO4, be most soluble in? Explain. (a) pure water (b) 0.05M NaNO3 (c) 0.05M Na2SO4 (d) 0.05M Pb(NO3)2

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Chemistry

03/22/22

Predict what will happen if nitric acid is added to a solution of [Ag(NH3)2]Cl in NH3 (aq) (Hints: (1) What other type of reaction happens ? (2) Use Le Chatalier Principle)

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Chemistry

03/21/22

What is the pH of a 0.770 M solution of Ca(NO₂)₂ (Ka of HNO₂ is 4.5 × 10⁻⁴)?

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Chemistry

03/21/22

How many milliliters of water must be added to 265 mL of a one. 75 M HCL solution to dilute it to 750 M assuming volumes are additive

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Chemistry

03/21/22

Write the heat of formation reactions for the following species: a.) KClO3 (s) b.) C6H12O6 (s) C.) F (g)

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Chemistry

03/21/22

A solution contains 22.9 g of Al+3 ion. How many equivalents of Al+3 ion are in the solution

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Science Chemistry Biochemistry

03/20/22

Enthalpy of Reaction

Please do include a solution. Thank you!1. 3𝐻2(𝑔) + 𝑂3(𝑔) → 3𝐻2𝑂(𝑙)2. 𝑁2𝑂(𝑔) + 𝑁𝑂2(𝑔) → 3N𝑂(𝑔)3. 𝐶𝑎𝐶2(𝑠) + 2𝐻2𝑂(𝑙) → 𝐶𝑎(𝑂𝐻)2(𝑠) + 𝐶2𝐻2(𝑔)

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Science Chemistry Biochemistry

03/20/22

First Law of Thermodynamics (Chemistry)

Please include a step-by-step solution. Thank you. Calculate the change in the internal energy of a system if 50 kJ of heat is added to it and if the system performs 20 000 J of work. Determine the... more

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HClO is a weak acid ( 𝐾a=4.0×10−8 ) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.090 M in NaClO at 25 °C? pH=

A 0.250 M solution of a weak base has a pH of 9.45 . What is the base hydrolysis constant, 𝐾b , for the weak base? 𝐾b=

A 0.16 M solution of a base is 2.4% hydrolyzed (𝛼=0.024). Find 𝐾b. 𝐾b=

The balanced combustion reaction for C6 H6 is

How much heat is absorbed when 18.3g of KCl decomposes to K and Cl2 Show the conversions required to solve this problem.

what is the scientific standard notation for 4.3*10^-1

If [H3O+] = 7.4x10-4M, what is the pH of the solution? Report your answer to 2 decimal places.

Calculate the heat evolved when 355 g of octane burns

Find the amount of heat given off from the combustion of 323.2 g CH3OH

What volume of the solution would produce 0.287 g of AgCl if 26 ml of a HCl solution required 26.25 ml of 0.095 N NaOH in titration?

If a 0.250 g sample of zinc oxide (95%) was treated with 50 ml of 1.123 N sulfuric acid,

A 4.0520 g sample of hydrochloric acid, sp gr 1.18, required 44.15 ml of 0.9035 N sodium hydroxide in a titration.

A solution is 1.0x10-4 M in NaF, Na2S, and Na3PO4. What would be the order of precipitation as a source of Pb2+ is added gradually to the solution? Assume negligible volume change.

At what temperature will 0.82 mol Cl2 exert a pressure of 1.78 atm at a volume of 2.71 L?

If the measured pH of an aqueous solution is 2.96, what is [H3O+]? Report your result to 5 decimal places.

Use the Henderson-Hasselbalch equation to perform the following calculations.

Stoichiometry and chemical reactions

In which of the solutions will Lead sulfate, PbSO4, be most soluble in? Explain. (a) pure water (b) 0.05M NaNO3 (c) 0.05M Na2SO4 (d) 0.05M Pb(NO3)2

Predict what will happen if nitric acid is added to a solution of [Ag(NH3)2]Cl in NH3 (aq) (Hints: (1) What other type of reaction happens ? (2) Use Le Chatalier Principle)

What is the pH of a 0.770 M solution of Ca(NO₂)₂ (Ka of HNO₂ is 4.5 × 10⁻⁴)?

How many milliliters of water must be added to 265 mL of a one. 75 M HCL solution to dilute it to 750 M assuming volumes are additive

Write the heat of formation reactions for the following species: a.) KClO3 (s) b.) C6H12O6 (s) C.) F (g)

A solution contains 22.9 g of Al+3 ion. How many equivalents of Al+3 ion are in the solution

Enthalpy of Reaction

First Law of Thermodynamics (Chemistry)

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