Gold can be extracted from gold-bearing ores by treating the ore with sodium cyanide, NaCN, in the presence of oxygen; the balanced reaction is   4Au + 8 NaCN + O2 + 2 H2O ---> 4 NaAu(CN)2 + 4 NaOH   If you have 1.00 x 103 kg of ore, what volume of 0.075 M NaCN, in liters, do you need to extract the gold assuming that the mass percent of Au in the ore is 0.019%?

Q: The maximum amount of iron(III) hydroxide that will dissolve in a 0.105 M iron(III) nitrate solution…

A: Given: Concentration of iron (III) nitrate i.e. Fe(NO3)3 = 0.105 M

Q: Na,CO3(ag) + CaCl»(ag) → 2 NaCl(aq) + CaCO3(s) Calculate the volume (in mL) of 0.100 M CaCl2 needed…

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Q: Question 1 what is the formation of the keytone compound Answer HO. R OH R H₂0 und? Is the answer…

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Q: Iron(II) can be oxidized to iron(III) by dichromate ion, which is reduced to chromium(III) in acid…

A: From given  Initially with the data , the reaction is given and from the reaction number of moles of…

Q: 0.7532 g of copper turnings (molar mass: 63.546 g∙mol–1) are reacted with excess nitric acid.…

A: Disclaimer: In order to obtain copper sulfate the acid used in excess should be sulfuric acid and…

Q: In the reaction between KCl(aq) and AgNO3(aq), a precipitate of AgCl(s) will form. What mass (in…

A: Molarity of AgNO3 solution = 0.220 Volume of AgNO3 solution = 27.2*10-3 Molar mass of KCl= 74.55…

Q: The Burke Museum at the UW is analyzing a dinosaur bone sample for the amount of calcium it…

A: The solid

Q: . What mass of precipitate (in g) is formed when 55.2 mL of 0.500 M AlBr₃ reacts with excess AgNO₃…

A: As per our guidelines we can only solve first question. Please resubmit other questions as next…

Q: 100.0 mL of an aqueous solution containing 0.250 M KOH(aq) is mixed with 100.0 mL of an aqueous…

A: First of all, we need to write down the balanced chemical.  The molar mass of Fe(OH)3 = 106.87g/mol

Q: 170.00 mL of 0.500 M BaCl2(aq) is mixed with 60.000 mL of 0.500 M Li3PO4(aq). Assuming 100% yield,…

A: The overall reaction will be :   3 BaCl2(aq) + 2 Li3PO4(aq) = Ba3(PO4)2(s) + 6 LiCl(aq)…

Q: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)2(aq), until no further…

A:

Q: (1) Identify each of the following half-reactions as either an oxidation half-reaction or a…

A: The ionic compound  decomposes to its corresponding ions and give the different product .

Q: What mass of Ca(OH)2 is required to react completely with a 25.00 mL sample of  0.1234 M HCl(aq)?

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Q: The reaction of phosphoric acid with barium hydroxide occurs. What mass of barium phosphate would…

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Q: What mass of precipitate (in g) is formed when 250.0 mL of 0.200 M CoCl₂ is mixed with excess KOH in…

A: The balanced equation is given as;   CoCl2(aq) + 2 KOH (aq)→Co(OH)2(s)+2KCl(aq) From the question,…

Q: You have 0.729 g of an unknown acid, H2A, which reacts with NaOH according to the balanced equation…

A: This question is based on titration and equivalent weight. Data given : Mass of the acid  = 0.729 g…

Q: When 3.5 g of CaF2 (an insoluble salt, Ksp = 3.9 X 10-11) is added to water to make 200. mL of…

A: mole  = mass  /  molecular weight molecular weight of CaF2 = 78.07 g/mole concentration = mole  *…

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.700 M Zn(NO₃)₂ reacts with 23.0 mL of…

A: Number of moles of substance=Concentration of substance x Volume of substanceFor…

Q: How many moles of precipitate will be formed when 81.2 mL of 0.300 M AgNO₃ is reacted with excess…

A: According to the balanced chemical equation, 2 moles of AgNO3 gives 2 moles of AgI (precipitate).…

Q: A sample of 6.15 g6.15 g of solid calcium hydroxide is added to 30.0 mL30.0 mL of 0.490 M0.490 M…

A: Limiting reagent for a reaction is defined as the reactant that is in lesser quantity than the other…

Q: Concentration of calcium in a sample may be determined by precipitation using the chromate ion,…

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Q: 2.) Five standardized dilutions of aqueous lead(11) chromate solution were prepared by adding a…

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Q: What is the net ionic equation for the chemical reaction that occurs when aqueous solutions of…

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Q: How many moles of precipitate will be formed when 69.3 mL of 0.300 M AgNO₃ is reacted with excess…

A: Given, 69.3 mL of 0.300 M AgNO₃

Q: Suppose you are titrating a sulfuric acid solution of unknown concentration with a sodium hydroxide…

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Q: ation experiment, a 5.00-mL sample of sulfuric acid, H2SO4, from a car battery is diluted with…

A: In inorganic laboratories, titrations are carried out to calculate the unknown concentrations of the…

Q: W

A: In this reaction, NaOH is reacting with FeCl­3 to give NaCl and Fe(OH)3 is getting precipitated. In…

Q: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)₂(aq), until no further…

A: Answer: In this question we have to convert the mass of PbCl2 into moles of Pb(NO3)2 to find out its…

Q: Concentration of calcium in a sample may be determined by precipitation using the chromate ion, Cro…

A:

Q: Suppose you took a 3.00 mL sample of HNO3 (aq) of an unknown concentration, and find that you have…

A: Given: Volume of HNO3 = 3.00 mL Volume of NaOH solution = 20.30 mL Molarity of NaOH solution = 0.106…

Q: 20.00-mL portion of the diluted acid is titrated with 0.2025 MNaOH solution. If 42.00 mL of the NaOH…

A: Such kinds of problems are solved by considering the mole concept. The mole concept relates the…

Q: 38 mL volume of 1.74 M Fe(NOa)a is mixed with 43 mL of 0.98M Fe(NOa solution. Calculate the molar…

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Q: A useful application of oxalic acid is the removal of rust (Fe203) from, say. bathtub rings…

A: Iron(III) oxide reacts with oxalic acid to form iron(III) oxalate, water, and hydrogen ions. The…

Q: How many grams of Ag₂CO3 will precipitate when excess Na2CO3 solution is added to 49.0 mL of 0.590 M…

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Q: Titration shows that a 5 mL sample of nitrous acid, HNO2, has a concentration of 0.5 M. If 8 mL of…

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Q: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)2(aq), until no further…

A:

Q: react

A: Acid: V =15 ml, M =? Base: V = 55.7 ml and M = 0.1 M

Q: 16.792 g of Ba(OH)2 (171.342 g.mol) is weighed out and carefully dissolved to make a 500.00cm…

A: Provided amount of  Ba(OH)2=16.792g Molar mass of Ba(OH)2= 171.342g/mol Initially volume of solution…

Q: For the balanced reaction      Mn2(SO4)5(aq) + 10LiOH(aq) --> 2Mn(OH)5(s) + 5Li2SO4(aq) how many…

A: The question is based on the concept of reaction stoichiometry. Where to calculate mass of lithium…

Q: CH3COOH

A: Acid-Base Titration Base: V = 55.7 ml, Molarity = 0.10 M Acid: V = 15 ml, Molarity = ? M

Q: How many grams of magnesium phosphate, Mg3(PO4)2, would you need if you were required to make 270.0…

A: MOLARITY: Molarity is defined as the measure of the substance with a specific volume of the solution…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".