A 1.00 g sample of a magnesium-aluminum alloy yields 0.107 g H2 when treated with an excess of HCl(aq). What is the percentage by mass of Al in the alloy? [Hint: This is the inverse of Example 4-16. To solve this problem, let m and 1.00 - m be the masses of Al and Mg, respectively, and then use these masses in the setup above to develop an equation that relates m to the total mass of H2 obtained. Then solve for m.]

Q: Potassium permanganate in acidic solution is used to titrate a solution of copper(I) ions, with…

A: Given,23.14 g of KMnO4Volume of KMnO4 = 1000mLVolume of copper ion = 200mLThen number of moles of…

Q: If the absorbance of a solution of copper(II) ion decreases by 41.00% upon dilution, what volume of…

A: Since as per the Beer-Lambert law, the absorbance of a solution is proportional to its concentration…

Q: A 0.5962 g sample of iron ore is dissolved in perchloric acid (HClO4 ). All iron present is oxidized…

A:

Q: 19- by heating 2.86 g of hydrated sample of washing soda Na,CO3.XH20, till Complete drying the…

A: This reaction is all about the  conversion of hydrous salt into anhydrous salt by applying heat to…

Q: In the laboratory you are given the task of separating Ag" and Co" ions in aqueous solution. For…

A: If either of the given ions forms a precipitate on reaction with the reagent to the mixture then the…

Q: balance this chemical reaction ___________Fe +__________O2 → __________Fe2O3

A: Given reaction is, ___________Fe +__________O2 → __________Fe2O3

Q: tanium occurs in the magnetic mineral ilmenite (FETİO3), which is ten found mixed up with sand. The…

A:

Q: Which of the following ions form distinctive colors (i.e. not white or colorless) upon addition of…

A: Aluminum  upon addition of aqueous NH3 gives white precipitate of Al(OH)3. Calcium usually does not…

Q: What is the net ionic equation for the reaction of calcium nitrate with sodium chloride ?

A: The given reactants are calcium nitrate, Ca(NO3)2 and sodium chloride, NaCl.  Both Ca(NO3)2 and NaCl…

Q: An iron ore was analyzed by dissolving a 1.957-g sample in concentrated HCl. The resulting solution…

A:

Q: 4. A metallurgist wants to gold-plate a thin sheet with the following dimensions: 1.5 in x 8.5 in x…

A: Given: The dimensions of the plate = 1.5 in × 8.5 in × 0.0012 in And the thickness of gold required…

Q: Aluminum in an ore sample is determined by dissolving it and then precipitating with base as Al(OH)3…

A: Given, 0.2385 g of precipitate

Q: In the laboratory you are given the task of separating Ca2+ and Ag* ions in aqueous solution. For…

A: The compound formed by every metal ion with another anion possesses a different solubility depending…

Q: the reaction of sodium phosphate (Na3PO4) solution with lead (II) chlorate [Pb(ClO3)2] solution…

A: Precipitation reactions occur when cations and anions in aqueous solution combine to form an…

Q: 173: Upon oxidation, barium (Ba) compounds give

A: Since we know that Ba is an alkaline earth metal which generally identify by  flame test .

Q: What is efflorescence? Give an example?

A: The structure of chemical compound can be represented as structural formula. A structural formula…

Q: In the laboratory you are given the task of separating Ca2+ and Zn2+ ions in aqueous solution. For…

A:

Q: ( P 4 ) is commercially prepared by heating amixture of calcium phosphate (CaSi O 3 ), sand (SiO 2…

A: Given that : Mass of Ca3(PO4)2 = 250.0g Mass of SiO2 = 400.0 g Yield of P4 =? Percent yield of P4 =?…

Q: redox reaction? Oyes O no 2Fe(s) + 3NICI, (aq) 2FEC1, (ag) + 3Ni(s) reducing agent: oxidizing agent:…

A: Reducing agent is a substance that tends to bring about reduction by being oxidized and losing…

Q: Aluminum is produced commercially by the electrolysis of Al,0, in the presence of a molten salt. If…

A: Given,  Amount of current in million A = t = 0.670 million A  Time in hour = t = 2.50 h  Mass of Al…

Q: The amount of calcium carbonate (CaCO3; molar mass = 100.1 g mol-1) in the ore dolomite can be…

A: Theoretical yield of the product is given by: Theoretical yield of the product = Molecular mass…

Q: A secondary step in the process to produce ultra-pure silicon for electronic applications involves…

A: The reaction is given below as: Silicon tetrachloride reacts with magnesium to give ultra-pure…

Q: A stock solution containing Mn2+ ions was prepaned by dissolving 1.584 g pure manganese metal in…

A: The concentration of stock is calculated as,

Q: The mercury in a 1.9458 g sample was precipitated as Hg5(IO6)2  by treatment with an excess of…

A: Given  mass of sample = 1.9458 g mass of precipitate Hg5(IO6)2 = 0.5218 g    Required data -…

Q: Lead poisoning is a serious condition resulting from the ingestion of lead in food, water, or other…

A: Given, Amount of lead present in 0.1 L of blood = 45 × 10-6 g Amount of lead present in 1 L of blood…

Q: Write chemical equations for each of the following chemical and physical processes: (a)…

A: Answer:- This question is answered by writing the chemical equation for the given both chemical and…

Q: The aluminium in a 1.2 g sample of impure NH4Al (SO4)2 was precipitated as hydrous Al2O3. The…

A: The number of moles is defined as the ratio of the mass of a substance to its molar mass. Number of…

Q: The active ingredient in a zinc nutritional supplement is ZnSO, · 7 H,O (molar mass = 287.58 g/mol).…

A:

Q: A sample of magnetite  (impure Fe3O4) weighing 0.4500 g is fused with oxidizing flux and the ferric…

A: Magnetite is an ore of Fe with the formula Fe3O4

Q: Copper metal heated with sulfur produces solid copper(ii) sulfide. Write the balanced equation and…

A: The reactants given are copper metal and sulfur to produce copper (II) sulfide.

Q: How many coulomb will it take to plate out 11.2g of fe from a solution FeCl2?

A: 96500 C of charge deposits one mole of the substance.

Q: Potassium permanganate in acidic solution is used to titrate a solution of iron(II) ions, with which…

A:

Q: 3. What is the percentage of sulfur in a sample of 2 gm of coal that gave a precipitate of 0.084 g…

A: Moles of sulfur ( S ) atoms = moles of BaSO4 =  given mass of BaSO4molar mass of BaSO4 = 0.084233.4…

Q: You are told by your instructor to go to the stock room and find a bottle of the chemical K3Cl. Does…

A: Given formula of chemical is K3Cl  We need find whether a compound with this  formula exist or not

Q: What is the maximum possible yield (in grams) of the NaN3?

A: Number of moles = mass/molar mass  Ideal gas equation;-  PV= nRT  Molar mass of NaN3 = 65.009 g/mol…

Q: A 0.5664 g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in…

A: The ore sample contains aluminum and is extracted using dissolution and filtration. The solution is…

Q: the aluminum (FW= 26.98 g/mol) in a 1.200 g sample of impure ammonium aluminum sulfate was…

A: molar mass of NH4(AlSO4)2= 237.1452g/mol molar mass of Al2O3=101.96g/mol molar mass of Al…

Q: In the laboratory you are given the task of separating Ag* and Fe* ions in aqueous solution. For…

A: Inorganic cations can be separated using different reagents. For the separation of Ag+ and Fe2+, the…

Q: Write “true” or “false” for each statement. (a) We balancechemical equations as we do because energy…

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Q: /hen exposed to air, aluminum metal, Al, reacts with oxygen, O2, to produce a protective coating of…

A:

Q: Gold can be determined in solutions containing high concentrations of diverse ions by ICP. Aliquots…

A: For the purpose of the solution of this question, I am assuming that you are permitted to use excel.…

Q: 0.9545 g of calcium nitrate salt, Ca (NO3) 2, is weighed, dissolved in concentrated HCl solution and…

A:

Q: Magnesium metal (Mg(s)) burns brightly in oxygen gas (O2(g)) to produce a whitish-grey powder,…

A: Balanced chemical equation is defined as a chemical equation in which the product and reactant sides…

Q: In the preparation of Rochelle salt (MW = 282.83 g/mol), 6.6 grams of monohydrated Sodium carbonate…

A:

Q: In the laboratory you are given the task of separating Ca²* and Co²* ions in aqueous solution. For…

A: Given

Q: A 0.8571 g sample of iron ore is dissolved in acid, the iron is oxidized to the +3 state and then…

A: The mass of the iron ore sample is = 0.8571 g The mass of iron(III) oxide is = 0.1132 g The molar…

Q: 5. A 0.5664 g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in…

A:

Q: g. Aluminium in 1.200 g sample of impure ammonium aluminium sulphate was precipitated with aqueous…

A: Given: Mass of the sample=1.200g Mass of anhydrous Al2O3=0.1798g Atomic weight of Al=26.98 g mol-1…

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".