03/20/23

Consider the titration of 30.0 mL of 0.251 M weak base B (Kb = 1.3 x 10⁻¹⁰) with 0.150 M HI. What would be the pH of the solution after the addition of 20.0 mL of HI?
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03/19/23

Equilibrium and using ICE tables
For the reaction 2 NO₂(g) ⇌ 2 NO(g) + O₂(g) Kp = 1.11 × 10⁻⁵ at 200 °C. A 2.50 L vessel at 200 °C is filled with NO₂(g) at an initial pressure of 4.00 atm and allowed to come to equilibrium. What... more
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03/19/23

Chemistry - acid/base
Assume there are aqueous solutions of the same concentrations. Please place the following compounds in order of increasing pH. K2HPO4, H3AsO4, LiHSO3, NaHC2O4, C6H5N, C2H5NH3NO3, NH4ClO4I think I... more
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03/19/23

General chemistry
An ideal gas sample had a volume of one liter at sea-level conditions of 1.01bar and 18•c. As the gas enters the atmosphere,500km above the sea-level,the volume increased to 3.5×1011litres at a... more
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03/19/23

Chemistry 2 chapter 13 or 14 question
A 4.17 ppm solution of BaCl2 in water has a density of 1.24 g/mL. What is the molarity?
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03/19/23

Chemistry 2 chapter 13 question

A solution of NaCl in water has molality of 1.55. What is a mole fraction Xnacl.
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03/18/23

What mass of carbon dioxide is produced from the complete combustion of 8.40x10-3g of methane
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03/18/23

need help with chem pH question please
A)Determine the pH and percent dissociation of a 0.183M propionic (CH3CH2COOH) acid solution. Begin by writing the balanced chemical equation. B) A portion of the above propionic acid solution was... more
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03/18/23

Chemistry problems help
Consider a galvanic cell based on the half reactions:Fe2+ (aq) + 2e^- -> Fe (s) Ered = - 0.447 V2H+ (aq) + 2e^- -> H2 (g) Ered = 0.000 VThe iron compartment contains an iron electrode in a... more
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03/18/23

Chemistry problems help
Consider a galvanic cell based on the half reactions:Fe2+ (aq) + 2e^- -> Fe (s) Ered = - 0.447 V2H+ (aq) + 2e^- -> H2 (g) Ered = 0.000 VThe iron compartment contains an iron electrode in... more
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03/18/23

need help with calculating the pH of the following...
Determine the pH for the following solutions. Show your work to support your answer:a. 0.227M HCl     b. 0.186M NH3      c. 0.088M KHCO3
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03/18/23

chemistry help please!
Consider the following reaction:SO2 + 2 H2S → 3 S + 2 H2OIf 4.95 g of SO2 reacts via this reaction in excess H2S, what mass (in g) of H2O will be produced?
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03/17/23

What is the molar solubility of AgCl (Ksp = 1.80 × 10⁻¹⁰) in 0.390 M NH₃? (Kf of Ag(NH₃)₂⁺ is 1.7 × 10⁷)
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03/17/23

What is the solubility of Mg(OH)₂ at a pH of 12.10? (Ksp Mg(OH)₂ is 1.6 × 10⁻¹³)
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03/17/23

What is the solubility of La(IO₃)₃ in a solution that contains 0.200 M La³⁺ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)
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03/17/23

fill in the ice tables
a student was titrating a solution of hydrazine, H2NNH2, with a strong acid solution. determine the pH at a particular point in the titration. do this by constructing a BCA table, constructing an... more
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03/17/23

what is the concentration of B at equilibrium?
Consider the reaction.A(aq)↽−−⇀3B(aq) c=8.50×10−6 at 500 KIf a 2.50 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?[B]=??
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03/17/23

Calculate the equilibrium constant, Kc.
At a certain temperature, 0.4011 mol of N2 and 1.501 mol of H2 are placed in a 4.50 L container.N2(g)+3H2(g)↽−−⇀2NH3(g)At equilibrium, 0.1401 mol of N2 is present. Calculate the equilibrium... more
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03/17/23

If the percent yield is 83.4%, what mass of oxygen is needed to produce 125g of HCN?
Hydrogen cyanide gas is produced by reacting ammonia gas, oxygen gas, and methane gas according to the reaction below. If the percent yield is 83.4%, what mass of oxygen is needed to produce 125g... more
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03/16/23

A 25.0 mL solution of HCl is neutralized with 16.7 mL of 0.115 M Sr(OH)₂. What is the concentration of the original HCl solution?
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03/16/23

Chemical reaction balancing problem
4.800 g of H2 was mixed and ignited with 36.40 g of O2. How much and which substances will be present in the reaction flask when the reaction is complete? Prove that the total mass of all the... more
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03/16/23

Chemistry: Finding empirical formula
Question: A hydrocarbon undergoes complete combustion, with oxygen present, to produce CO2 and water. On collecting the two products it was found that 2.20 g of CO2 and 0.90 g of vapourised water... more
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03/16/23

Chemistry: Finding empirical formula from moles
Question: Combustion of an alkane produces 3 moles of water and 2 moles of carbon dioxide. What is its empirical formula?Options: C2H3 CH2 CH3 CH (Ans: CH3)
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03/16/23

Chemistry: Finding Molecular Formula when Volume is given
Question: Complete combustion analysis of a hydrocarbon compound was performed to define its molecular formula.On complete combustion, the hydrocarbon gave 20 cm^3 of CO2 and 60 cm^3 of water.The... more
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03/16/23

I need help on this chemistry problem, thank you!
A gas has a volume of 3.56 LL at 0 ∘C. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if n and P do not change?10.4 LExpress your... more
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