03/10/22

What percent, by mass, of the mixture was FeSO4?
A mixture consists of FeSO4 and Fe2(SO4)3. A 0.1223 g sample of this mixture was dissolved in water and titrated with a 0.00420 M KMnO4 solution. The titration required 18.85 mL of the... more
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03/09/22

How do you solve this?
6) NO3¯ + H2O2 ---> NO + O21) The half-reactions 2) Multiply the top half-reaction 3) combine 2HNO3 + 3H2O2 ---> 2NO + 4H2O + 3O28) BrO3¯ + Fe2+ ---> Br¯ + Fe3+1) half-reactions:2) final... more
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03/09/22

Silver consists of two isotopes with masses 107.23amu 59.50% and 109.27amu 40.50 calculate atomic mass of silver
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03/09/22

How do you solve this pls help?
H2C2O4 + MnO4¯ ---> CO2 + Mn2+1) The balanced half-reactions:2) Equalize the electrons:3) The final answerO2 + As ---> HAsO2 + H2O1) correct half-reactions:2) equalize the electrons3) The... more
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03/09/22

Glucose is a simple sugar that is 40% carbon, 6.7% hydrogen, and 53.3% oxygen. What is its empirical formula?
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03/09/22

How many moles of lithium nitrate will be needed to make 2.45 moles of Pb(NOg)4, assuming that you have an adequate amount of Pb(SO4)2 to do the reaction?
I'm completely lost on this one. Help!
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03/09/22

If this reaction releases 407 kJ of energy, how many grams of H2O are formed? Show the conversions required to solve this problem. 2H2(g)+O2(g)⟶2H2O(g)Δ𝐻=−484 kJ

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03/09/22

How much work, 𝑤, must be done on a system to decrease its volume from 18.0 L to 9.0 L by exerting a constant pressure of 6.0 atm?

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03/09/22

Solve for the normality of 0.545 grams sodium carbonate in a 500 ml solution.
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03/09/22

A silver chloride sample was allowed to dissociate in 15 ml of water.

What is the chloride ion concentration if the sample weighs 0.5479 g?
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03/09/22

NiO adopts the face-centered-cubic arrangement. Given that the density of NiO is 6.67 g/cm3, calculate the length of the edge of its unit cell (in pm).
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03/09/22

LiF has the same unit cell as NaCl (fcc). The edge length of the LiF unit cell is 402 pm. Determine the density of LiF in g/cm3.
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03/08/22

I need help solving this chemistry problem.

A voltaic cell using Pb²⁺/Pb and Ni²⁺/Ni half-cells is set up at standard conditions, and each compartment has a volume of 355 mL. What is the cell potential, in V, after it has delivered 0.150 A... more
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03/08/22

Phosphoric acid production
Impure phosphoric acid for use in the manufactureof fertilizers is produced by the reactionof sulfuric acid on phosphate rock, ofwhich a principal component is Ca3(PO4)2.The reaction isCa3(PO4)2(s)... more
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03/08/22

equilibrium summary
Calculate the molar solubility of BaSO4 (Ksp = 1.1 x 10-10) in water AND in a solution containing 1.0 M barium ions.
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03/08/22

equilibrium summary
Will a precipitate form when 65.0 mL of 0.0200 M Ag2SO4 is mixed with 50.0 mL of 0.00500 M K2CO3? The Ksp for silver carbonate is 8.00 x 10-12.
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03/08/22

equilibrium summary
5.00 moles of CH2H5OH were mixed in a container. What is the equilibrium concentration of water under these conditions if Kc = 4.50. CH3CO2H (g) + C2H5OH (g) => CH3CO2C2H5 (g) + H2O (g)
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03/08/22

equillibrium summary
At a particular temperature Kc = 47.1. The eqilibrium concentrations of H2 and HI were found to be 0.00480 M and 0.0353 M respectively. Calculate the equilibrium concentration of I2 under these... more
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03/08/22

eqilibrium summary
Analysis of the mixture showed that at equilibrium the concentrations of PCl3, Cl2, and PCl5 were 0.0175 M, and 0.118 M respectively. Calculate the value of Kc at this temperature.PCl5 (g) =>... more
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03/08/22

An excess lead nitrate solution was added to a 6.5 g sample mixture containing strontium nitrate and potassium bromide to precipitate out 0.8993 g of lead (II) bromide.

Solve for the percent by mass of the individual components of the mixture.
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03/08/22

An excess sodium sulfate was added to a 53-ml sample of barium nitrate.

If 3.09 g of ppt was formed, what is the molar concentration of the sample?
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03/08/22

3. Consider the addition reaction between propene, C3H6, and chlorine gas, Cl2 that forms 1,2-dichloropropane. Using bond energies, what is the enthalpy change for this reaction?

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03/08/22

At a certain temp, Kp for decomposition of H2S is 0.718. H2S-->H2+S
Initially only H2S is present at a pressure of 0.140 bar in a closed container. What is total pressure in the container at equilibrium?
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03/07/22

What volume of 0.861 mol L-1 NaOH solution is needed to just completely neutralize a 0.987 mol L-1 solution of CH3COOH with volume 27 mL? Your answer should be expressed in mL.
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03/07/22

chemistry equations
The reaction for the combustion of propane isC3H8(g)+5O2(g)⟶3CO2(g)+4H2O(l)Δ𝐻=−526.3kcalmolHow much heat is released when 31.4 g of propane is burned?
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