Which of the following chemical formulas and names of compounds correctly matched? (A) PbO2 = lead dioxide %3D (B) HgNO3 = mercury(I) nitrate (C) NazPO4 = trisodium phosphate %3D (D) BaO2 = barium peroxide

Q: How many moles od C9H8O4 are in a .700g tablet of aspirin?

A: The chemical formula of aspirin is C9H8O4. Given, mass of aspirin = 0.700 g We know that molar mass…

Q: Iron ore is impure, Fe2O3. When Fe2O3 is heated with an excess of carbon (coke), metallic iron and…

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Q: To three significant digits, what is the mass percentage of iron in the compound Fe2O3?

A: Molar mass of Fe = 55.85g/mol Molar mass of O = 16g/mol Molar mass of Fe₂O₃ = 2(55.85) + 3(16) =…

Q: One of the hydrates of NazCr0, is sodium chromate decahydrate. A 56.6 gram sample of NazCr04 10 H,O…

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Q: A chemical compound containing only carbon, hydrogen and oxygen is found t composed of 57.43% C and…

A: Empirical formula:  Simplest mole number ratio of atoms present in a compound is called is called…

Q: Methanol isobutene If 45.0 kg of methanol are allowed to react with 70.okg of isobutene, what is the…

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

Q: Combustion of a 1.505 g sample of thiophene, a carbon–hydrogen–sulfur compound,yields 3.149 g 0.645…

A: Thiophene is composed of carbon, hydrogen, and sulfur. On combustion, it will give carbon dioxide,…

Q: Sulfur dioxide is a major industrial gas used primarily forthe production of sulfuric acid, but also…

A: The process of formation of SO2during the process is ,4FeS2(s) +11O2(g) →2Fe2O3(s) +8 SO2(g)It is…

Q: Chemical analysis shows that the oxygen-carryingprotein hemoglobin is 0.34 percent Fe by mass. What…

A: Heamoglobin is a protien for oxygen transport . The heam group in Hb is Fe metal. Binding of oxygen…

Q: Hydrogen peroxide breaks down, releasing oxygen, in the following reaction: 2H,0,(aq) – 2H,O(1) +…

A: The given reaction is as follows: 2H2O2(aq) →2H2O(l) +O2(g) The moles of O2 produced = 4.10 mol The…

Q: Calculate the mass percent composi - tion of oxyaen in AizCS04)s, in Šignificant figures.

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Q: 3.124 What mole ratio of molecular chlorine (Cl2) to molecularoxygen (O2) would result from the…

A: The mole ratio of the reaction has to be given,

Q: How to convert 6.7125558746858e+25 molecules of CO2 (carbon dioxide) to grams of oxygen?

A: First, convert the molecules into moles of carbon dioxide,

Q: Progesterone, a female hormone, has the formula C21H30O2. In a 25.00 g sample of this compound, a.…

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Q: a. What isthe percent by mass of water in iron (II) sulfate heptahydrate, FeSO4 • 7H2O  (or what…

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Q: What's the percentage by mass of Cl in MgCl2 if it  is 24.6% Mg by mass?

A: Intrdouction : %age by mass of Mg = 24.6%

Q: This organic compound consists of 54.4% carbon, C and 9.1% hydrogen, H, while the remaining percent…

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Q: What is the molarity of a solution prepared by dissolving 37 mol KMNO4 in enough water to make 903 L…

A: Dear student I have given answer to your question in the image format.

Q: What is the mass, in kilograms, of an Avogadro’s number ofpeople, if the average mass of a person is…

A: The average mass of person is 160 lb. One pound is equal to 0.4535 kilograms.

Q: 4.00g of a metal carbonate MCO, gives 1.91 g of MO on heating to constant mass. Identify metal M in…

A: In this question weight of metal carbonate and metal oxide is given and asked identification of…

Q: f 37.0 g of MgSO4⋅7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain?…

A: On strong heating, water molecules get removed and turn hydrated salt into anhydrous salt.The…

Q: Disulfide dichloride (S,Cl,) is used in the vulcanization of rubber, a process that prevents this…

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Q: A florist prepares a solution of nitrogen-phosphorus fertil-izer by dissolving 5.66 g of NH₄NO₃ and…

A: Given: Mass of NH4NO3 = 5.66 g Mass of (NH4)3PO4 = 4.42 g And volume of final solution = 20.0 L

Q: Nitrogen (N), phosphorus (P), and potassium (K) are themain nutrients in plant fertilizers. By…

A: It is given that N/P/K ratio needs to be calculated and we are provided by the N/P2O5/K2O, mass…

Q: A new organic material is to be examined by combustion analysis. Burning 0.09303 g of this sample in…

A: The sample contains the percentage of, C = 40.63 % H = 5.08 % O = 54•28%

Q: 2. How many grams of aspirin (C,H3O4) are present in 7.95 102 molecules of C,H;O4. The answer is

A: Molar mass of aspirin = 180.16 g/mol  It means 1 mol of aspirin has= 180.16 g  1 mol of any compound…

Q: Iron ore is impure, Fe2O3. When Fe2O3 is heated with an excess of carbon (coke), metallic iron and…

A: Mass of sample=938 gMass of Iron obtained=523 gmass % of Fe2O3=?

Q: Taking 28,6 g of Na2CO3.xH2O, it is heated in a burner flame. After the heating process, the mass of…

A: The reaction when Na2CO3.xH2O is heated is as follows: Na2CO3.xH2O →Na2CO3+xH2O

Q: 1 CH; H CH3 Molecular formula: H,C-C-C-Ċ-CH, Empirical Formula:

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Q: What volume (in ml) of a 0.25OM KMnOtac.contains 0 500g KMnO,2 What are the number of moles of…

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Q: 1.- Calculate-the mass ff Ba3(PO4)2 produced from the reaction of 0.85 g NazPO4:12H20 with excess…

A: The relationship between moles, mass and molar mass is: Moles = MassMolar mass

Q: Lead(II) chromate (PbCrO₄) is used as the yellow pigmentin traffic lanes, but is banned from house…

A: Lead is dangerous for the body. Lead poisoning can lead to death if its concentration is very high…

Q: The principal component of mothballs is naphthalene, a compound with a molecular mass of about 130…

A: Record the given information,

Q: :The empirical formula of P401ois

A: First question is graded. I will solve second question for you. Empirical formula refers to the…

Q: Give the empirical formula for the following compounds: a) b) d) Paragraph BIU A + v GO ...

A: Molecular formula is the formula of a compound that gives the total number of atoms present in that…

Q: In an experiment, 34.8243g of copper (II) nitrate hydrate, Cu(NO3)2•zH2O was heated to a constant…

A: Given, mass of copper (II) nitrate hydrate is 34.8243g and when heated the mass is 27.0351g.  The…

Q: 47. Calculate the molar mass of the following substances. a. H. b. H c. (NH,),Cr,O,

A: Atomic mass of an atom is the total number of protons present in that atom. While the sum of atomic…

Q: What is the mass percent of carbon in the following compound? C5H9O2 Enter your answer as a…

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Q: Calculate the percent oxygen by mass in disilicon trioxide(Si2O3) to 3 significant figures.

A: Molar mass of O = 15.999 g/mol.Molar mass of Si2O3 = 104.168 g/mol.

Q: Q1/ What is the weight, in milligrams, of 0.250 mmol Fe2O3 (ferric oxide),F.wt (159.7 mg/mmol)?

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Q: The koala dines exclusively on eucalyptus leaves. Its digestivesystem detoxifies the eucalyptus oil,…

A: Empirical formula- The formula of compound which represent simplest whole number ratio of elements…

Q: The percent by mass of nitrogen for a compound is found to be 30.5%, Which of the following could be…

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Q: B. What is empirical formula of a compound 32.65% S, 65.3% O and 2.04% H?

A: Convert the percentage to gram, 32.65%  = 32.65g of S. 65.3% = 65.3g of O. 2.04%=2.04 g of H

Q: In an experiment, 34.8243g of copper (II) nitrate hydrate, Cu(NO3)2•zH2O was heated to a constant…

A: GivenMass of hydrated salt = 34.8243gMass of anhydrous salt = 27.0351gMass of water lost = 7.7892g

Q: Mesitylene, a hydrocarbon found in crude oil, has an empirical formula of C3H4 and an experimentally…

A: The formula weight of the empirical formula is: C3H4 = 3×(Atomic mass of C) + 4×(Atomic mass of H) =…

Q: If 0.525 g of Fe2O3.xH2O are heated and 0.408 g of Fe2O3 are obtained, what is the value of x?

A: Weight lose can be calculated as,Heating will remove the water of hydration so the difference in…

Q: Q1) A sample of limestone (containing calcium carbonate, CaCo,) weighing 438 mg is treated with…

A: Molar mass of CaCO3 = 40 + 12 + 3(16) = 100 g Molar mass of CaC2O4 = 40 + 2(12) + 4(16) = 128 g…

Q: What is the mass percentage of C in CH,CH,OH?

A:

Q: 3. What mass of KIO, is needed to convert the copper in 0.2750 g of CuSO, 5H,0 to Cu(IO,),?

A: First, write out the chemical equation. 2KIO3 +CuSO4.5H2O  ----> K2SO4 +5H2O+Cu(IO3)2

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.