A sample of 0.2500 g of an antimony alloy is taken and converted into Sb2O4 by appropriate processes. Since the product brought to constant weight is 0.1305 g, calculate the percentage of antimony in the alloy (Sb = 121g / mol, 0 = 16 g / mol).

Q: A prospector wants to know how much gold is in the ore that he has been mining.  A sample weighing…

A: Mass of the gold sample taken for analysis = 11.2456 g  11.2456 g is diluted to 200.00 mL to form…

Q: Sodium oxalate, Na2C2 04, in solution is oxidized to CO2 (g) by MnO, which is reduced to Mn2+. A…

A: Given: The volume of MnO4- required for titration of Na2C2O4, (V1) = 50.1 mL. = 0.051 L The volume…

Q: An element reacts with oxygen to give a compound with a high melting point. This compound is also…

A:

Q: Classify the following compounds as substitutional, interstitial, or intermetallic alloy: (i) PAB015…

A:

Q: Which of the following is a correct balanced equation for the reaction described here? Ferric oxide…

A: The correct balanced reaction has to be given,

Q: An ore containing magnetite, Fe3O4, was analysed by dissolving a 4.9 g sample in concentrated HCl,…

A:

Q: Which of the following set of elements contain only type II metals? O Na, Ca, Mg O Mn, Cd, Co O Ni,…

A:

Q: Mineral Groups Silicates: contain silicon (Si) and oxygen (O) metals plus CO3 metals plus SO4 metals…

A: Below attached file showing the details answer.  All the best.

Q: Many transition metals and their compounds are used as catalysts. Given MnO2, FeCl3, Pt, and Ni,…

A: Catalyst are the compounds that lowers the activation energy of reaction to increase the rate of the…

Q: 2. This steel is used in railway wheels and tracks, gears, and crankshafts. * O High carbon steel O…

A:

Q: A sample of an oxide of Sn, A weighing 3.014g was heated at a low temperature losing part of its…

A: Suppose, the formula of A is SnxOy Number of mole of Sn present = 2.374118.7=0.02 mole

Q: An Al2O3 whisker is a small single crystal used to reinforce metal-matrix composites.  Given a…

A:

Q: a 0.500 g sample of impure magnetite (Fe3O4) is converted by chemical reactions to Fe2O3(159.69…

A: The question is based on quantitative analysis. we have to find out percentage iron oxide present in…

Q: 22. Copper is obtained from sulfide ores through a two-step process consisting of roasting the ore…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: 2. The next few questions will ask you to explain the following properties for these three different…

A: Since you have asked a multiple part table, we will fill first 3 rows for you. For remaining table,…

Q: Metal oxides form a basic substance with water.   a. True b. False

A: Metal oxides form a basic substance with water ---> True

Q: Fe2S3 -----> 2Fe + 3S What mass of sulfur (S) is produced from the thermal decomposition of 12.5g…

A: Molar Mass of Fe2S3 = 207.9 g Molar Mass of Sulphur = 32.065 g

Q: The less electropositive element is: A. Na B. Be C. Li D. Mg

A:

Q: Which species is oxidized based on the following reaction? 2 Al* (aq) + 2 Fe(s) → 2 Al(s) + 3…

A: Check reactant side of reaction once again because on reactant side it is 2Fe and on product side it…

Q: If you began with 24 moles of Fe203, approximately how many moles of pure iron would be formed as a…

A: Given :-  2 Fe2O3 + 3 C ----> 4 Fe + 3 CO2  Number of moles of Fe2O3 = 24 mol  To calculate :-…

Q: Tourmaline is the most colorful of all gemstones. It neutralizes negative forces and offers…

A: Mole of a substance is that quantity that contain 6.022 x 1023 units of that substance. It is also…

Q: The element G has an atomic number less than 30. Its highest oxidation state is +6 and its ions are…

A: The atomic number of the element is less than 30. The highest oxidation state is +6 and colored.

Q: An element "A" with an atomic weight of 39.23 g/mol is added to a pure element of "Z" with an atomic…

A: Given,  Atomic weight of element A = 39.23 g/mol Atomic weight of element Z = 21.39 g/mol Weight…

Q: A sample of soda-lime glass for tableware is analyzed and found to contain the following percentages…

A: Given- % by mass of oxides SiO2 = 72.4% Na2O =18.1% CaO = 8.1% Al2O3 =1.0% MgO = 0.2% BaO = 0.2%…

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

A:

Q: Element X reacts with element Y to give a product containing X 3+ ions and Y2- ions.

A: Ionic compounds are always electrical neutral, so total charge should be zero. Equation: 2 X3+   + 3…

Q: A 0.4560 g mixture of FeCl3 and FeBr3 was dissolved in water and reacted with excess NaOH. All of…

A: The balanced chemical equation for the reaction is: (FeCl3+FeBr3) (aq)+3NaOH(aq)-> Fe(OH)3(s) + 3…

Q: Describe how the following changes are brought about: (i) Pig iron into steel. (ii) Zinc oxide into…

A: ( i ) Pig iron into steel: Pig iron is charged into basic oxygen furnace (BOF) and water cooled…

Q: 26. A 1.500 g sample of iron ore, labeled A, was processed accordingly to give 0.5215 g of pure…

A: Here we are required to find the percentage of Fe and ferric oxide present in the iron ore B having…

Q: Give reasons, why copper is used to make hot water tanks and not steel (an alloy of iron)

A: Copper is used to make hot water tanks. Steel reacts with steam.

Q: The following are limitations of ferrous alloys except corrosion susceptibility low electrical…

A: Ferrous Alloy:- These are the ones having iron as their major element They are abundantly available…

Q: Calculate the percentage by mass of nitrogen in calcium trioxonitrate (v) Ca(No3)

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Q: Which element is neither a transition element nor a representative element? Iron Manganese…

A: Hence 3rd option is correct that is mercury

Q: What volume of O2 (g) is collected at 25.0°C and 1.02 atm if 1.00 kg of water is electrolyzed?…

A: Let us consider a gas 'Q' The ideal gas equation for the gas : PV = nRT P = Pressure of the gas V =…

Q: Complete and balance the following equation for reaction of As with excess 02: As(s) + 02(g) →…

A: Balanced chemical reaction is the chemical equation that contains an equal count of atoms of every…

Q: MCQ 176: The process of decomposition of calcium carbonate (CaCO,) and formation of calcium oxide…

A: Decomposition reaction of CaCO3 is, CaCO3 ----> CaO + CO2

Q: Consider the reaction: CH 4( g) + 2O 2( g) → CO 2( g) + 2H 2O( g) Which of the following statements…

A: Given: The reaction is CH 4( g) + 2O 2( g) → CO 2( g) + 2H 2O( g)

Q: In the alloy containing sn pb and cd, the mole ratio sn/pb is 2.73/1 and the mass ratio of pb/cd is…

A:

Q: If your base metal is Fe, which among the following metals can you use as a noble coating for…

A: We use coating to prevent corrosion of the metal that we want .  Metal to be used for coating must…

Q: 22. Copper is obtained from sulfide ores through a two-step process consisting of roasting the ore…

A: Copper sulfide reacts with oxygen and carbon to give copper, sulfur dioxide, and carbon monoxide.…

Q: What mass of limestone, in kilograms, should be added for 1.00 kilogram of iron ore processed in a…

A: Answer :-  0.118 (kg) Limestrone Mass of Limestone, in kilograms, should be added for 1.00 kilogram…

Q: Simplified explanation of nitride and carbon in minerals, simplified explanation of the mechanism of…

A: Explanation- @ Nitride in minerals-       In chemistry, a nitride is a compound of nitrogen where…

Q: 1. _________________is used in the process of paper chromatography.  A. Filter Paper B. Whatman…

A: 1. Paper chromatography technique is used to separate the dissolved chemical compounds based on…

Q: A 1.500 g sample of iron ore, labeled A, was processed accordingly to give 0.5215 g of pure Fe2O3…

A: Mass percent :- The mass in grams of a substance present in 100 grams of the mixture is defined as…

Q: Which species is oxidized based on the following reaction? 2 Al3+ (aq) + 2 Fe(s)→2 Al(s) + 3…

A: Which species is oxidized on the following reaction ?

Q: Make the structure based on the Blomstrand-Jorgensen theory and calculate the effective atomic…

A: Blomstrand proposed that ammonia molecule could link together as CH2 chains in hydrocarbons, and…

Q: Bronze

A: Zinc :- In ocean corrosion occurs very fast. So, to protect hull from corrosion zinc is ised as…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.