A medal must contain a minimum of 6 grams of gold (MW = 196.97 g/mol) and at least 92.5% silver. A total of 340 medals were awarded. Suppose each medal is made by coating a 60-mm diameter, 3-mm thick, gold-free silver alloy disk with gold via electrolytic deposition using a gold (III) solution, Determine the following: a) Time required in hours to finish plating all the gold medals with minimum gold content if the available electricity source can deliver 50 amperes of current

Q: Balance the following equation in standard form and determine the sum of the coefficients. FeO(s)…

A: Reaction- FeO (s) + O2 (g) →  Fe2O3 (s) Left hand side Right hand side Fe = 1 Fe = 2 O = 3 O…

Q: write the balanced chemical equation of the reaction , Carbon monoxide reacts with iron ore to form…

A: When Carbon monoxide reacts with iron ore (hematite) to form elemental iron and carbon…

Q: A student is given a 1.8686 g of an unknown copper compound. Following isolation by displacement by…

A: Given: Mass of Cu = 0.3685 g Mass of compound = 1.8686 g

Q: i) ii) Steel essentially contains a) 80% or more iron b) 50% or more iron c) Alloying elements like…

A: The above questions can be answered as

Q: What is the reducing agent in the rusting process? (Express your answer as a chemical formula.)

A:

Q: What physical properties, other than specific heat, could you use to help you identify the metal…

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Q: An alloy of Sn, Pb, and Cd has a mole ratio of Sn to Pb of 2.73:1.00, and the mass ratio of Pb to Cd…

A: Given,An alloy of Sn, Pb, and Cd has a mole ratio of Sn to Pb of 2.73:1.00, and the mass ratio of Pb…

Q: 7. The zirconium oxalate K,Zr(C,04)3(H2C204) · H20 was synthesized by mixing 1.68 g of ZroCl, · 8H20…

A:

Q: Bricks are used in construction. They are O ceramic materials alloys O composites O polymeric solids

A: Answer is ceramic material.

Q: 03 CaCl2(aq) +2 K3PO4 (aq) →> 6 KC1 (aq) + Ca(PO4)2 (5)

A: Ionic equation : An ionic equation is a chemical equation in which the electrolytes in acqueous…

Q: [References) Cryolite (NazAIF6) is used in the commercial production of aluminum from ore. Cryolite…

A:

Q: a student carries out this chemical reaction in a beaker  Zn+CuCl2 -> Cu+ZnCl2 after the reaction…

A: A student carries out this chemical reaction in a beaker  Zn+CuCl2 -> Cu+ZnCl2 After the reaction…

Q: Some chemical reactants are listed in the table below. Complete the table by filling in the…

A: Applying concept of oxidation state.

Q: 45. Iron + Water → Iron III oxide + Hydrogen 46. Sodium hydroxide + Chlorine > Sodium chloride +…

A:

Q: .Write a balanced chemical equation for each of the following: a) elemental copper combines with…

A: According to guidelines, I have to solve only first 3 subparts of 1st question only. we have to find…

Q: A 50.0-mL aliquot of unknown Cu(II) solution was exhaustively electrolyzed to deposit all copper on…

A: Faraday's law of electrolysis In electrolytic cell, the weight of substance that deposited on…

Q: 21.) In the equation: KMnO4 + KBr + H2SO4 → MnSO4 + Br2 + K2SO4 + H2O, if balanced, there would be…

A:

Q: Which element is oxidized in the reaction below? Fe(CO)5 (1) + 2HI (g) → Fe(CO)412 (8) + CO (g) + H2…

A: The addition of electrons or decreases in the oxidation state is known as a reduction reaction and…

Q: Calculate the grams of nickel (58.69 g/mol) can be electroplated from a solution of Ni(NO3)2(aq)…

A:

Q: Write a balanced equation for the reaction between nitrous acid and copper (II) hydroxide. O HNO3 +…

A:

Q: balance the chemical equation:  Cu2CO3(OH)2 + H2O+ HCO2H → CO2+ H2O+ Cu(CHO2)2 * 4H20

A: Balanced chemical equation of a reaction is written according to law of conservation of mass.…

Q: 3. (Balance this reaction In Basic Solution): 103 (aq) + Zn (s) → -1=15-2×3=-6 Zn²+ (aq) + (aq)

A: Answer:

Q: Fe,O;(s) + 3CO(g)→2FE(s) + 3CO, (g)

A: Change in oxidation no. Of Fe = +3

Q: The iron content of iron ore can be determined by titration with a standard KMnO4 solution. The iron…

A:

Q: 5. The phosphorus in a sample of phosphate rock weighing 0.5428 g is precipitated as MGNH,PO4 .6H20…

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Q: 2. A sample iron ore weighing 0.6428 g is dissolved in acid, the iron is reduce to Fe2*, and the…

A:

Q: To balance the chemical equation SiO2+HF→SiF4+H2OSiO2+HF→SiF4+H2O, you could introduce coefficients…

A:

Q: potassium carbonate + lead (II) nitrate

A: The reactants given are 1) Potassium carbonate i.e K2CO3  2) Lead (II) nitrate i.e Pb(NO3)2

Q: Solid strontium hydride is an effective drying agent. It reacts with liquid water to form solid…

A: Oxidising agent: those species oxidise others and reduce itself. Reducing agent: those species…

Q: How many mg of iron are present in a 236.5 g ore sample containing 0.15% iron by mass?

A: We need to first calculate the mass of iron present by mass in the given quantity of ore, and then…