03/02/24

Reaction Mechanisms
18) Consider the following elementary steps Step 1: (fast) A + B ⇌ C + D (--> is k1, <-- is k-1)Step 2: (slow) C + B --> D (--> is k2)What is the overall rate law?I don't... more
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03/02/24

Solving for a reactant in solution
One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride anions in solution will combine... more
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03/02/24

Using molarity to find solute moles and solution volume
Calculate the volume in liters of a 0.299/molL barium acetate solution that contains 475.mmol of barium acetate BaC2H3O22. Be sure your answer has the correct number of significant digits.
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03/02/24

Dilution of Chemical Reactions
A chemist must prepare 750.mL of 2.00M aqueous potassium iodide KI working solution. She'll do this by pouring out some 2.91molL aqueous potassium iodide stock solution into a graduated cylinder... more
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03/01/24

Calculate the equilibrium partial pressures of the reactants and products if the initial pressures are PPCl5 = 0.5000 atm and PPCl3 = 0.5050 atm.
For the reaction below, Kp = 25.1 at 800 K.PCl5​(g)PCl3​(g)+Cl2​(g)Calculate the equilibrium partial pressures of the reactants and products if the initial pressures are PPCl5 = 0.5000 atm and... more
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03/01/24

Determine the equilibrium concentration of H2O if the starting concentrations of both reactants are 0.003923 M, with [HOCl]o = 0.000 M.
The value of Kc for the reaction between water vapor and dichlorine monoxide is 0.0900 at 25°C.H2​O(g)+Cl2​O(g)2HOCl(g)a. Determine the equilibrium concentration of H2O if the... more
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03/01/24

Using molarity to find solute moles and solution volume Problem PageQuestion
A chemist adds 1.10L of a 0.74M aluminum chloride AlCl3 solution to a reaction flask. Calculate the millimoles of aluminum chloride the chemist has added to the flask. Be sure your answer has the... more
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03/01/24

Dilution of Chemical Equations
A chemist must dilute 46.7mL of 42.2μM aqueous zinc oxalate ZnC2O4 solution until the concentration falls to 16.0μM. He'll do this by adding distilled water to the solution until it reaches a... more
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02/29/24

Energy Transfer
What is the change in temperature if 90 grams of steam releases 945 calories of energy
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02/29/24

Using molarity to find solute moles and solution volume
Calculate the volume in milliliters of a 0.724M aluminum sulfate solution that contains 75.0mmol of aluminum sulfate Al2SO43. Be sure your answer has the correct number of significant digits.
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02/29/24

Dilution of Chemical Reactions
A chemist makes 870.mL of silver nitrate AgNO3 working solution by adding distilled water to 160.mL of a 1.92molL stock solution of silver nitrate in water.Calculate the concentration of the... more
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02/29/24

How many milligrams of a 24 mg sample of cesium-137 remain after 120 years?
How many milligrams of a 24 mgmg sample of cesium-137 remain after 120 years?
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02/29/24

If 21.35 mL of 0.005 M iodine solution is needed to titrate a solution of commercial vitamin C tablet (500 mg) prepared in a 100-ml volumetric flash, then what is the mass % of the vitamin C?
If 21.35 mL of 0.005 M iodine solution is needed to titrate a solution of commercial vitamin C tablet (500 mg) prepared in a 100-ml volumetric flash, then what is the mass % of the vitamin C?
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02/29/24

Dillution Chemical Reactions
A chemist must prepare 275.mL of 92.0μM aqueous mercury(II) iodide HgI2 working solution. She'll do this by pouring out some 94.8μmolL aqueous mercury(II) iodide stock solution into a graduated... more
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02/29/24

Na2CO3 + Ca(NO3)2 → CaCO3 + 2NaNO3 what mass of calcium nitrate in grams is needed to produce 5.69mol of sodium nitrate?
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02/28/24

how do I find my ratio of moles of KClO3 decomposed to Moles of O2 produced?
i have the moles of KClO3 decomposed and O2 created but how do I find the ratio? I'm told the ratio has to be one of these 2:1, 1:1, 2:3. I have 0.020 mol KClO3 and 0.019 mol O2.
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02/28/24

What is the maximum mass of S8 that can be produced by combining 86.0 g of each reactant? 8SO2 + 16H2S —-> 3S8 + 16H2O
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02/28/24

Can a covalent network crystal with sp3d2 hybridization form a 2d solid?
For example, XeF4
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02/28/24

Separation of charcoal/NaCl/CuCl2

When provided with a solid mixture of charcoal, NaCl, CuCl2 and given only water and ethanol, how can you separate the three?
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02/28/24

A 2.50 L vessel is injected with 5.42 mols of C2H6, 8.90 mols of O2, 6.14 mols of H2O, and 2.67 mols of CO2.

A 2.50 L vessel is injected with 5.42 mols of C2H6, 8.90 mols of O2, 6.14 mols of H2O, and 2.67 mols of CO2. Set up but do not solve the equation to find equilibrium concentrations if Kc for this... more
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02/26/24

Calculating molarity using solute moles
A chemist prepares a solution of barium acetate BaCH3CO22 by measuring out 117.μmol of barium acetate into a 150.mL volumetric flask and filling the flask to the mark with water. Calculate the... more
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02/26/24

Calculating Molarity using Solute Moles
A chemist prepares a solution of magnesium fluoride MgF2 by measuring out 0.0531μmol of magnesium fluoride into a 500.mL volumetric flask and filling the flask to the mark with water.Calculate the... more
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02/26/24

I don't understand CHM 151 please help :)
A 0.436 g sample of the acid is titrated with 0.185 M NaOH. What is the molar mass of the compound is 13.1 mL of the NaOH solution is required to nutrilize the sample
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02/25/24

calculate delta H
Oxygen (O₂) is necessary for cellular respiration; it must be transported from the lungs to tissues through the bloodstream. However, O₂ is not very soluble in water. The Keq of oxygen dissolving... more
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02/25/24

Calulate initial pressure (in ATM)
Consider the formation of phosgene: CO(g) + Cl₂(g) ⇌ COCl₂(g) Into a sealed 1.50 L flask, chemist placed 3.00 × 10⁻² mol of phosgene gas (COCl₂) and heated it to 800.0 K. After the system reached... more
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