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Chemistry

05/09/24

My question concerns Dalton's law of partial pressures.

In a sample of 2.55 g of propane, C3H8, is collected in a container at a pressure of 2.55 bar. In a separate container 1.01 g of methane, CH4, are collected. the two gases are then combined into... more

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Chemistry

05/08/24

Determine the mass of NaCl and sodium chloride

Part 1. A chemist reacted 12.0 liters of F2 gas with NaCl in the laboratory to form Cl2 gas and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and... more

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Chemistry

05/07/24

What is the solubility of Cr(OH)₃ at a pH of 10.10? (Ksp Cr(OH)₃ is 6.70 × 10⁻³¹)

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Chemistry

05/07/24

What is the solubility of PbF₂ in a solution that contains 0.0850 M F⁻ ions? (Ksp of PbF₂ is 3.60 × 10⁻⁸)

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Chemistry

05/07/24

What is the solubility of MgCO₃ in a solution that contains 0.060 M Mg²⁺ ions? (Ksp of MgCO₃ is 3.5 × 10⁻⁸)

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Chemistry

05/07/24

What is the solubility of La(IO₃)₃ in a solution that contains 0.150 M IO₃⁻ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)

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Chemistry

05/07/24

how many grams of MgCI2 is produced if 150 grams of Mg is used??

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Chemistry

05/07/24

Finding the quantity of heat

What quantity of heat, in kJ, is required to convert 17.0 g of ethanol (C₂H₅OH) at 23.0 °C to a vapor at 78.3 °C (its boiling point)? (specific heat capacity of ethanol = 2.46 J/g • °C; ∆Hvap =... more

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Chemistry

05/07/24

J. R. S. PLEASE HELP

The Standard enthalpies of formation of gaseous propyne (C3H4), propylene (C3H6), and propane (C3H8), were experimentally determined to be +136.1 kJ, +36.1 kJ, and -136.1 kJ respectively.A... more

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Chemistry

05/06/24

Electrochemistry

Consider the galvanic cell:Pt(s) I H2(g, 0.100 bar) I H+(aq, pH=2.54) II Cl-(aq, 0.200 M) I Hg2Cl2(s) I Hg(l) I Pt(s)(a) Which half-cell is the anode and which is the cathode? Find their standard... more

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Chemistry

05/06/24

Electrochemistry

Write the line diagram for the cell in which the following reaction occurs:2 AgCl (s) + Pb (s) + 2F- (aq) = Ag (s) + PbF2 (s) + 2Cl- (aq)

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Chemistry

05/06/24

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0102 M solution. The pH of the resulting solution is 2.68 . Calculate the for the acid. K_{a}

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Chemistry

05/05/24

C3H4(g)+4O2(g)->3CO2(g)+2H2O(v). a) Calculate the heat of combustion per mole of C3H4 if the standard enthalpy of formation of gaseous propyne is +134.5 kJ/mol (continued in desc)

b) Calculate the heat evolved upon combustion of one kilogram of C3H4.H2O heat of formation: -241.8 kJ/molCO2 heat of formation: -393.5 kJ/molPLEASE USE SIG FIGS!!!!

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Chemistry

05/05/24

At a certain temperature, 0.3811mol of N2 and 1.521 mol of H2 are placed in a 4 L container.

N2 (g) + 3H2 (g) ⇔ 2NH3 (g) At equilibrium, 0.1201 mol of N2 is present. Calculate the equilibrium constant Kc. (please be as detailed as possible, thank you so much)

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Chemistry

05/04/24

Decomposition of liquid benzene to gaseous acetylene: C6H6 (l) -> 3 C2H2 (g). Delta H=630.0 kJ. What is the total energy change (Delta E) of the system if 34.5 g of benzene decomposes at STP?

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Chemistry

05/04/24

Gen Chem 2 ICE Table & Equilibrium Equation

Determine the quantity of sodium acetate (CH3COONa) needed to create buffer solution at a particular pH. Do this by constructing an ICE table, writing the equilibrium constant expression, and using... more

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Chemistry

05/04/24

Gen Chem 2 ICE Table & Equilibrium Equation

Determine the concentration of C6H5NH3+ in a buffer solution by constructing an ICE table, writing the equilibrium constant expression, and use this information to determine the concentration of... more

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Chemistry

05/04/24

A sample of nickel is to be determined using absorption spectrum analysis.

A sample of nickel is to be determined using absorption spectrum analysis. A 0.286 g sample of nickel ore is crushed and digested in 1M HNO3. The stock solution is then diluted to 250.0 mL in a... more

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Chemistry

05/03/24

General Chemistry 2

Consider a buffer made by adding 132.8 g of NaC₇H₅O₂ to 300.0 mL of 1.41 M HC₇H₅O₂ (Ka = 6.3 x 10⁻⁵) What is the pH of this buffer?

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Chemistry

05/03/24

General Chemstry 2

What ratio of NaCN to HCN is needed to prepare a pH 10.30 buffer? (Ka of HCN is 4.9 × 10⁻¹⁰)

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Chemistry

05/03/24

General Chemistry 2

What is the pH of a buffer made from 0.350 mol of HBrO (Ka = 2.5 × 10⁻⁹) and 0.100 mol of KBrO in 2.0 L of solution?

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Chemistry

05/03/24

General Chemistry 2

What is the pH of a solution of 0.300 M HNO₂ containing 0.250 M NaNO₂? (Ka of HNO₂ is 4.5 × 10⁻⁴)

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Chemistry

05/03/24

Gen Chem 2 Buffer pH

What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to which 0.160 mol of NaOH were added?

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Chemistry

05/03/24

Calculate the cell potential, G (J), and the equilibrium constant Keq for the following electrochemical cell and determine the spontaneous reaction direction.

Calculate the cell potential, G (J), and the equilibrium constant Keq for the following electrochemical cell and determine the spontaneous reaction direction.Pb(s) | Pb2+ (1.50 x 10-5 M) ||... more

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Chemistry

05/03/24

read description for question

Part 1. A chemist reacted 12.0 liters of F2 gas with NaCl in the laboratory to form Cl2 gas and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and... more

Follows • 2

Answers •1

My question concerns Dalton's law of partial pressures.

Determine the mass of NaCl and sodium chloride

What is the solubility of Cr(OH)₃ at a pH of 10.10? (Ksp Cr(OH)₃ is 6.70 × 10⁻³¹)

What is the solubility of PbF₂ in a solution that contains 0.0850 M F⁻ ions? (Ksp of PbF₂ is 3.60 × 10⁻⁸)

What is the solubility of MgCO₃ in a solution that contains 0.060 M Mg²⁺ ions? (Ksp of MgCO₃ is 3.5 × 10⁻⁸)

What is the solubility of La(IO₃)₃ in a solution that contains 0.150 M IO₃⁻ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)

how many grams of MgCI2 is produced if 150 grams of Mg is used??

Finding the quantity of heat

J. R. S. PLEASE HELP

Electrochemistry

Electrochemistry

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0102 M solution. The pH of the resulting solution is 2.68 . Calculate the for the acid. K_{a}

C3H4(g)+4O2(g)->3CO2(g)+2H2O(v). a) Calculate the heat of combustion per mole of C3H4 if the standard enthalpy of formation of gaseous propyne is +134.5 kJ/mol (continued in desc)

At a certain temperature, 0.3811mol of N2 and 1.521 mol of H2 are placed in a 4 L container.

Decomposition of liquid benzene to gaseous acetylene: C6H6 (l) -> 3 C2H2 (g). Delta H=630.0 kJ. What is the total energy change (Delta E) of the system if 34.5 g of benzene decomposes at STP?

Gen Chem 2 ICE Table & Equilibrium Equation

Gen Chem 2 ICE Table & Equilibrium Equation

A sample of nickel is to be determined using absorption spectrum analysis.

General Chemistry 2

General Chemstry 2

General Chemistry 2

General Chemistry 2

Gen Chem 2 Buffer pH

Calculate the cell potential, G (J), and the equilibrium constant Keq for the following electrochemical cell and determine the spontaneous reaction direction.

read description for question

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