Chromium metal is obtained by heating chromium(111) oxide with carbon.Calculate the mass percentage of chromium metal in the oxide,and then use this value to calculate the quantity of chromium(111) oxide(in grams and in kilograms) required to produce 850kg of chromium metal.

Q: Calculate the percentage composition for CC1 . Mass percentage of carbon = %3D Mass percentage of…

A:

Q: A sample of an iron alloy contains 90.2 g Fe, 2.15 g C, and 1.01 g Cr. Calculate the percent by mass…

A: Total mass of the alloy = mass of Fe + mass of C + mass of Cr = 90.2 + 2.15 + 1.01 = 93.36 g

Q: 4. A sample of 2.12 g of copper was heated in an oxygen atmosphere until no further change took…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Most abundant metal on the surface of the earth:(a) Iron(b) Aluminium(c) Calcium(d) Sodium

A: There are many metal on the surface of the earth but the one that is most abundant on the surface of…

Q: An 8.925 g sample of a compound containing only carbon, hydrogen, and oxygen gives 9.258 g of carbon…

A: Given : Mass of compound = 8.925 g Mass of CO2 produced = 9.258 g And mass of H2O produced = 5.351 g…

Q: What is the mass percentage of phosphorus in a sample of 8.53 phosphorus oxychloride containing a…

A: Mass percentage of phosphorus = 20.16 %

Q: Which of the following elements would you expect to have properties most similar to those of…

A: Given elements: a) Cu b) F c) Na d) Cr e) S

Q: What is the overall percent by mass of the Cr in the Cr-Zn alloy if the following alloys were to be…

A: Given We know about the mass percentage  given date is  A.100gram of 15% Cr in the Cr-Zn alloy  B.…

Q: Which one of the following has the smallest mass percent of F in the compound? A)SF6 B)NaF C)XeF2…

A: The details solution for this is provided below in attach image.

Q: Dolomite is a carbonate of magnesium and calcium. Analysis shows that 7.81 g of dolomite contains…

A: The given data contains, mass of dolomite = 7.81 g. mass of calcium = 1.70 g

Q: Calculate the mass percent of manganese (Mn) in potassium permanganate (KMnO4).

A: First of all, before leading to the solution we will learn about the meaning of mass percent. The…

Q: A mass spectrometer is an instrument that allows scientists to determinethe presence of elements in…

A: The elements are arranged as the periodic function of atomic numbers.  The elements are arranged in…

Q: Which pair of elements would you expect to exhibit the greatest similarity in their physical and…

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Q: 2. Balance the following equations (in the formation of heavier elements). a.*He +He - Be b. “He +n…

A: Given nuclear equations are :  a). 4He + 4He -----------> Be  b). 4He + n -------------> 4He…

Q: 6. Boron 7. Yttrium 8. Beryllium 9. Gallium 10. Mercury

A: Write electronic configuration of the given element---

Q: Determine the percent by mass platinum in cisplatin, PtCl2(NH3)2. O a. 58.5% O b.0.650% C. 65.0% O…

A: Given,  Cisplatin, PtCl2(NH3)2

Q: Calculate the percentage composition for BF3. Mass percentage of boron %3D Mass percentage of…

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Q: When 0.210 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: The symbol for iron is Fe The symbol for oxygen is O The molar mass of Fe is 55.85g/mol The molar…

Q: An element consists of 4.35% of an isotope with mass 49.946 u, 83.79% of an isotope with mass…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

Q: What is the alumina content in weight % of the garnet with Al as the only 3+ cation has Mg2.508…

A: It is given that Al and Mg2.508Fe0.492 are the part of mineral. The oxidation state of Al in the…

Q: a)Using the data provided, determine the mass percent of water and the mass percent of anhydrous…

A: Given, mass of hydrated copper (II) sulfate: 131.4g mass of anhydrous copper (II) sulfate: 130.26g…

Q: How many grams of magnesium are required to produce 4.380 kg of Siı? (At mass: Mg-24.31; Si-28.09)…

A: Recall the given reaction,  SiCl4  +  2 Mg                   Si  +  2 MgCl2   4.380 Kg of Si is…

Q: What volume of 5.0M NaCl is needed to provide10.0 grams NaCl?  Atomic weights: Na = 22.99  Cl =…

A: Molarity (M) : Number of moles of solute present in 1 litre solution is called molarity (M)…

Q: Lithium metal has an atomic radius of 152 pm. The molar mass of lithium is 6.94 g/mol and Avogadro`s…

A: Atomic radius = 152 pm = 152 × 10-10 cm  Avadagro constant = 6.022 × 1023  per mol  Molar mass of…

Q: Calculate the percentege mass in KMnO4. [Relative Atomic masses of: K= 39, Mn= 55 and O= 16]

A: Consider the given relative mass of the atoms present in KMnO4 is as follows; K = 39, Mn = 55 and O…

Q: iron (II) phosphate Ca3(PO)2->Fe,N +COCNJ2+FePo4 1. How many grams of calcium phosphate must be used…

A: The stepwise solution is as follows -

Q: Ca2* *4 Na* Fe NH NO3 so,4 Cl S2 PO,4 -3 CO, Cr,0,7 OH

A: A chemical compound consists of two or more different elements which are bonded with each other…

Q: What is the mass percent of oxygen in water: 33.3% 5.60% 88.8% O 11.2%

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Q: How many grams of magnesium are required to produce 3.000 kg of Si? (At mass: Mg=24.31; Si=28.09)…

A:

Q: Calculate the weight percent of Cr in an alloy that contains 60 g of chromium, 55 g of nickel and…

A: The alloy contains 60g Cr                               55g Ni                                1.45Kg…

Q: SnF2 is used as a tool against dental caries, because when interacting with the hydroxyapatite…

A: Mass content of Tin in Sn2(PO4)OH = 67.95 %

Q: Calculate the mass percent composition of iron for each iron ore: Fe2O3Fe2O3 (hematite), Fe3O4Fe3O4…

A: a) mass % composition of iron in Fe2O3 (hematite). molecular weight of Fe2O3  = 159.69 g/mol…

Q: C. What is the weight of ferrous sulfate FeSOa.7H: 0 should be taken to designate iron as ferric…

A: Recall the following reaction that will occur on heat of hydrated ferrous sulphate      FeSO4.7H2O…

Q: 0.896 g sample of impure magnesite, MgCO3 , was decomposed with HCl; the liberated CO2 was collected…

A:

Q: Calculate the percentage composition for N2F4. Mass percentage of nitrogen : % Mass percentage of…

A: The percentage composition of different atoms present in a compound can be calculated by dividing…

Q: Which one of the following has the smallest mass percent of F in the compound? A) SF₆ B) NaF…

A: The mass percentage of fluorine is 78.04 %.

Q: What is the mass percentage of oxygen in the compound C 6H 60 8? g? O 62 % O 72% O 6.2% O 58% O 76%

A: We can solve this problem by using the following equation Mass % of the element= (mass of…

Q: The elements of Group 1-B (Cu, Ag, and Au) are sometimes referred to as the “coinage  metals.” Why?…

A: Elements Copper ( Cu),  Silver ( Ag) and Gold (Au) are called as 'coinage metals' because as they…

Q: In a chemical reaction, atom type, atom number and total electrical charge is conserved. According…

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Q: What mass in grams of KIO3 is needed to convert the copper in 0.2444 g of CuSO4 .5H2O to Cu(IO3)2?…

A: Answer:- We determined mass of KIO3 By using Stoichiometry of chemical reaction .

Q: A 67.2 gg sample of a gold and palladium alloy contains 2.68×1023 atoms. What is the mass percentage…

A: Mass percent of an element is the ratio of its mass  in the compound to the total mass of the…

Q: A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater…

A: Phosphorous is a 15 group element. The atomic number of phosphorous (P) is 15 and its atomic mass is…

Q: 10) A patient is to be given 2 litres of 0.9% sodium chloride via intravenous infusion over a 24…

A: From given concentration of sodium chloride we can calculate the millimoles of sodium.

Q: Mass of crucible and cover   12.73g 2. Mass of crucible, cover, and sample   24.11g 3. Mass of…

A: Total mass lost by sample during heating = Mass of crucible, cover, and sample - Mass of crucible,…

Q: Calculate the percentage composition for SF6 . Mass percentage of sulfur Mass percentage of fluorine

A:

Q: A 67.2 g sample of a gold and palladium alloy contains 3.07×1023 atoms . What is the mass…

A: Given : Mass of sample = 67.2 g And total number of atoms = 3.07 X 1023 atoms Assuming the moles of…

Q: Ethyl mercaptan is an odorous substance added to natural gas to make leaks easily detectable. A…

A: Given : Total mass of ethyl mercaptan sample = 3.17 g And mass of sulfur in ethyl mercaptan sample =…

Q: Transition metals, located in the center of the periodic table,have many essential uses as elements…

A: The molar mass of a substance is the mass in grams of 1 mole of the substance. We can obtain 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.