02/16/24

Determine the molar solubility (S) of Zn(CN)2
Determine the molar solubility (S) of Zn(CN)2 in a solution with a pH= 5.53. Ignore activities. The Ksp for Zn(CN)2 is 3.0 x 10^-16. The Ka for HCN is 6.2 x 10^10. please help thank you!
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02/16/24

Complete the mass balance expression for a saturated solution of Ag2CO3. Ignore any subsequent reactions of Ag+.
Please help!
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02/15/24

A solution is made using 200.0 mL of methanol (density 0.7920 g/mL) and 789.1 mL of water (density 1.000 g/mL). What is the mass percent of the methanol?
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02/15/24

calculate the equilibrium pressure
Given that [Ni(CO)₄] = 0.200 M at equilibrium for the equation Ni(s) + 4 CO(g) ⇌ Ni(CO)₄(g) Kc = 5.00 × 10⁴ at 25.0 °C calculate the equilibrium pressure (in atm) of CO(g) at 25.0 °C.
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02/15/24

Ethyl chloride, C2H5Cl, is used as a local anesthetic. It works by cooling tissue as it vaporizes; its heat of vaporization is 26.4 kJ/mol. How much heat could be removed by 15.0 g of ethyl chloride?
please show step by step instructions on answer.
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02/15/24

Calculate the solubility of oxygen in water at the top of Mt. Everest where the atmospheric pressure is 0.320 atm.
Calculate the solubility of oxygen in water at the top of Mt. Everest where the atmospheric pressure is 0.320 atm. The mole fraction of O2 in air is 0.209. Assume the kH of O2 is... more
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02/14/24

weak acid pH calculation
H2S (Ka = 1.1 x10 -7 ) is dissolved in water to a concentration of 6.00 g H2S per 100.00 mL of water. Calculate the pH of this solution. Calculate the percent ionization the H2S solution.
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02/13/24

General Chemistry 2 Class
The acid-dissociation constant for hypochlorous acid, HClO, is 3.0 x 10^-8. Calculate the concentration of H3O+, ClO-, and HClO at equilibrium if the initial concentration of the acid is 0.075 M.
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02/13/24

General Chemistry 2 Class
A 0.100 M solution of bromoacetic acid 1BrCH2COOH2 is 13.2% ionized. Calculate [BrCH2COO-], [H+], [BrCH2COOH], and Ka for bromoacetic acid.
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02/12/24

Rate Equation and Rate Law
The rate of the reaction between CO and NO2, CO(g) + NO2(g) → CO2(g) + NO(g), was studied at 540 K starting with various concentrations of CO and NO2, and the data in the table were collected. ... more
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02/11/24

What amount of heat (in kJ) is required to convert 19.1 g of an unknown solid (MM = 83.21 g/mol) at -5.00 °C to a liquid at 52.3 °C?

(heat capacity of solid = 2.39 J/g･°C; heat capacity of liquid = 1.58 J/g･°C; ∆Hfus = 3.72 kJ/mol; Tf = 10.3°C). Please give me each step to how you came up with your answer.
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02/11/24

What is the vapor pressure of ethanol (in mmHg) at 43.9°C if its vapor pressure is 400.0 mmHg at 63.5°C? (∆Hvap = 39.3 kJ/mol; R = 8.314 J/K • mol)
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02/11/24

What is the concentration of Ca2+ in this solution if [OH-] is fixed at 3.00*10^-4 M?
Hydroxyapatite, Ca10(PO4)6(OH)2 has a solubility constant of Ksp= 2.34*10^-59 and dissociates according to:Ca10(PO4)6(OH)2 (s)—> 10Ca 2+ (aq) + 6PO4 3- (aq) + 2 OH- (aq). Solid hydroxyapatite is... more
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02/09/24

Question is in the description

Reaction: A+B-> C+D rate = K[A]^2[B]^2initial rate is 0.0970 M/swhat will the initial rate be if [A] is halved and [B] is tripled
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02/09/24

Activation Energy

Calculate the activation energy of a reaction if a temperature increase from 25.0 °C to 55.0 °C triples the rate constant. R = 8.3145 ×10⁻³ kJ/mol･K.
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02/07/24

Determine the vapor pressure of this solution at 25˚C, given that the vapor pressure of pure water at this temperature is 23.8 mm Hg.
Antifreeze is usually composed of a 1:1 mixture, by weight, of water and ethylene glycol (MW = 62.068 g/mol). Determine the vapor pressure of this solution at 25˚C, given that the vapor pressure of... more
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02/07/24

Zero order reaction
The zero order reaction A → Products takes 63.5 minutes for the concentration of A to decrease from 0.970 M to 0.241 M. What is the value of k for this reaction?
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02/07/24

Second Order Reaction
The second order reaction A → Products takes 13.5 s for the concentration of A to decrease from 0.740 M to 0.333 M. What is the value of k for this reaction?
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02/07/24

Equilibrium Pressures
3 H2 (g) + N2 (g) ↔ 2NH3 (g), Kp = 1.64 x 10-4In a reaction vessel containing only NH3 at 400°C, the initial pressure of NH3 is 0.850 In a reaction vessel containing only NH3 at 400°C, the... more
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02/07/24

The activation energy for a particular reaction is 102 kJ/mol. If the rate constant is 1.35 × 10⁻⁴ s⁻¹ at 314 K, what is the rate constant at 273 K?
this question has to do with integrated rate law.
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02/07/24

What is the concentration of A after 13.3 minutes for the reaction A → Products when the initial concentration of A is 0.750 M? (k = 0.0451 M⁻¹min⁻¹)
this has to do with integrated rate law
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02/07/24

Calculate the enthalpy change in kJ when 6.32 g P reacts with 14.2 liquid Br2
Red phosphorus reacts with liquid bromina according to the thermochemical reaction. Calculate the enthalpy change in kJ when 6.32 g P reacts with 14.2 liquid Br22P (s) + 3Br2(l) --> 2PBr3 (g) ... more
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02/07/24

what is the heat of formation for C2F3O (g)?
The EPA released a national drinking water health advisory for GenX, a class of compounds that are known polyfluoroalkyl substances. These chemicals have broad uses. The thermal decomposition of... more
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02/07/24

What is the heat change in enthalpy for the reaction (kJ/mol) of Mg(OH)2?

A common antacid called "Milk of Magnesia" uses magnesium hydroxide to neutralize excess hydrochloric acid in the stomach. The name comes from the fact that magnesium hydroxide has low solubility... more
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02/07/24

Balancing Equations and Stoichiometry
You burn some acetylene, C2H2, according to the unbalanced reaction. C2H2 + O2 —> CO2 + H2O. A) How many grams of acetylene would be required to produce 63 L of CO2 gas at 1000 C?B) How many... more
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