A chromium containing compound has a formula FexCryO4 and is 28.59% oxygen by mass  Find x and y

Q: A sample contains 43.7% phosphorus and 56.3% oxygen by mass. Determine its empirical formula. Write…

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Q: How many atoms of He can a balloon hold that has a 21 cm diameter hold? The density of Helium is…

A: Radius, r=diameter2=212=10.5 cm volume of spherical baloon…

Q: Calculate the number of atoms per cubic meter in lead. The density and atomic weight of lead are…

A: Given,  The density and atomic weight of lead are 11.35 g/cm3 and 207.2 g/mol and the Avogadro's…

Q: Anthracite is a type of coal that is composed of carbon with small amounts of hydrogen, oxygen,…

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Q: percent

A: CuO  + H2 ------------------ Cu  + H2o  Mm of CuO = 79g No of mole of Cu is = 4.7/79= 0.21mol From…

Q: A chromium-containing compound has the formula Fe,Cr,O, and is 28.59% oxygen by mass. Findx and y.

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Q: A Sample of pure Calcium fiuoride With a mass of 15.0g Contains 1.709 of calcium. How much calcium…

A: This question can be solved using proportion method as:

Q: How many grams of water (18.02 g/mol) would contain 6.54x10^24 hydrogen atoms?

A: Given :Molar mass of water = 18.02 g/molNumber of H-atoms = 6.54 x 1024We need to calculate the…

Q: The percent water in the compound is (atomic masses: Ba=137, Cl=35, 0=16, H=1) Given : BaCl, 2H,0

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Q: A compound was analyzed and the following results were obtained: • Molar mass: 270.4 g/mole • Mass…

A: The chemical formula of an unknown compound is determined by the percent by mass of the elements…

Q: 15 g N2O has how many atoms of nitrogen?

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Q: 1. Calculate the mass percent of wate

A: Given, a hydrated salt as follows,LiNO3.3H2Owe are asked to calculate the mass percent of water in…

Q: many grams of hydra n atomic masses: C: 1 n: Avogadro's numbe r the numerical value

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Q: A 10 gram sample of NaCl will have the same percent composition (percent by mass) of Na and Cl than…

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Q: Magnesium oxide contains 50.3 % magnesium by mass. Calculate the mass of magnesium oxide sample if…

A: Mass percent of an element expressed as the percentage ratio of mass of an element to the mass of a…

Q: completely in excess oxygen, and the mass of the products carefully measured: product mass carbon…

A: Explanation given as follows

Q: For the following reaction: NaN3=Na+N2 if 45.0 g of NaN3 decomposed, how many grams of sodium, and…

A: The given balanced reaction is as follows, The given grams of NaN3 is converted into moles first.

Q: Silver chloride, often used in silver plating, contains 75.27% Ag by mass. Calculate the mass of…

A: Percentage by mass – Formula is,

Q: What is the percent by mass of chromium (atomic mass = 52.00 g/mol) in Cr2S3 (mm = 200.20 g/mol)?…

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Q: 8.* A 4.00 gram sample of a hydrate of nickel(II) bromide loses 0.793 grams of water when heated.…

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Q: calulate the mass percent of magnesium (Mg) in magnesium nitride (Mg3N2)

A: Mass percentage of an element can be calculated by the division of mass of the element by the total…

Q: A 25.75 g sample of nitrogen oxide was found to contain 6.68 g of nitrogen and the rest oxygen…

A: Compound is made of N and O only. So Nitrogen oxide mass is given and nitrogen mass is given then…

Q: Is the volume of H2 produced larger than the volume of O2 producedbecause (a) hydrogen atoms are…

A: Given: The volume of H2 produced is larger than the volume of O2

Q: 1. A 4.00g sample of iodine was reacted completely with excess bromine. The mass of the compound…

A: We have to predict the empirical formula of compound.

Q: A compound consists of carbon and hydrogen. The molar mass of this compound is 44.1 g/mol. The…

A: Molecular formula of any compound can be determined by knowing the number of moles of each element…

Q: When aluminum metal is heated with an unknown element from group 6A (O, S, Se, Te) an ionic compound…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: m ni un f. a 65.2 g sample of à compoulnu 11. A substance whose formula is A20 (A is a mystery…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: An 85.00 g sample of an unknown compound contains 24.26 g molybdenum, 24.33 g sulfur, and the rest…

A: Given,  Mass of the compound = 85.00 g  Mass of molybdenum = 24.26 g  Mass of sulfur = 24.33 g  Mass…

Q: A 7.591-g gaseous mixture contains methane (CHa) and butane (C4H10). Complete combustion to form…

A: Given : Mass of mixture = 7.591 g Moles of oxygen required = 0.8970 mol The combustion reaction for…

Q: A chemical reaction was used to produce 1.61 moles of copper (II) bicarbonate, Cu(HCO3)2. What mass…

A: Given data:

Q: A compound that contains only copper and chlorine contains 2.363 g copper and 2.637 g chlorine. What…

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Q: EF and MF

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Q: 4. A 1.628-g sample of a hydrate of magnesium iodide is heated until its mass is reduced to 1.072 g…

A: Answer :- MgI2.8H2O The formula of given Hydrated Magnesium iodide = MgI2.8H2O…

Q: A 3.87 g sample of a hydrate of MnCl2 was heated to drive off the water. The anhydrous powder…

A: The mass of a hydrate of MnCl2 = 3.87 g The mass of the anhydrous powder after heating = 2.46 g We…

Q: Calculate the mass percent of H in C,HgO.

A: Since, molar mass of carbon = 12.0107 g/mol Molar mass of hydrogen = 1.0079 g/mol Molar mass of…

Q: 1. What mass of potassium chlorate would be needed to form 56.8 g of oxygen? 2KCIO3 ----> 2KCI + 3…

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: Substance X was analysed and found to contain 40.00 % carbon, 6.67 % hydrogen and 53.33 % oxygen by…

A:

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: Step - 1Formula for the compound = XBr3Means in 1 mol of compound 3 mol of Bromine are…

Q: Part 3 28.4 mL of 0.403 M (NH4)2CO3 mol NH4*: O 11.4 0.0228 O 11400 O 0.0114

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Q: How many grams of P are present in 2.92 grams of phosphorus triiodide ?

A: Molar mass of phosphorus triiodide (PI3) = 411.6872 g/mole Number of moles of phosphorus triiodide…

Q: Determine the mass percent STRONTIUM in SrNO3) Be sure to 'shouw a formula. Show Molar Mass…

A: Mass percent is the ratio of mass of that element to that of the molar mass of molecule.

Q: Nitrogen Hydrogen Sulfur Oxygen 1 ionic compound of (NH4)2503 atoms of N atoms of S atoms of O atoms…

A: (NH4)2SO3 is known as Ammonium Sulfite It consists of atoms of Nitrogen, Hydrogen , Sulfur and…

Q: 3. A mixture of Calcium carbonate and ammonium carbonate is 61.9% carbonate by mass. Find the mass…

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Q: Two binary oxides of the element manganese contain, respectively, 30.40% and 36.81% oxygen by mass.…

A: Empirical formula refers to the formula of a compound in which the elements are present in the…

Q: Narceine is a narcotic in opium that crystallizes from solu-tion as a hydrate that contains 10.8…

A: The value of x in narceine.xH2O is to be determined.

Q: Calculate the mass in grams of 15 atoms C

A: Mole is defined as    Interms of particles :  1 mole = 6.022 x 1023 atoms  Interms of mass :  1…

Q: A compound composed of tin (Sn) and oxygen (O) weighs 8.42 g. Decomposition of the compound produced…

A: mass of O = 8.42-6.63                    = 1.79 g

Q: A metal alloy containing 67% (by mass) lead and having a density of 9.4 g/cm3 . If the second metal…

A: Given Information -  mass % of lead,Pb= 67%  mass % of tin = 100% - 67% = 33%  mass of lead = 67 g…

Q: the mass percent of magnesium in MgSO4.

A:

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.