The analysis of a compound gives the following percent composition by mass: C: 54.34 percent; H: 9.447 percent; S: 10.36 percent; O: 25.85 percent. What is its molecular formula given that its molar mass is 309.4 g? C?H?S?O C atoms = H atoms = S atoms =  O atoms =

Q: hen copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment,…

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Q: The mole is a counting number that allows scientists todescribe how individual molecules and atoms…

A: Molecular weight of Cu(OH)2 = 97.562 gm/mol  Weight of Cu(OH)2 = 23.45 gm  Moles = weight/mol. wt. =…

Q: 155.2 g of NO, reacts with 33.9 g of H,0 according to this reaction. 2 NO, + H,O – HNO, + HNO, What…

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Q: Iron has a density of 7.87 g cm3 . What is the volume (in cubic inches) of an iron sample which…

A: The values are given as follows:

Q: 2 NH3   +  3 CuO   -->  3 Cu   +   N2   +   3 H2O In the above equation how many moles of  N2 can…

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Q: How many molecules of carbon dioxide, CO2, are in 4.77 x 10.2 g of the molecule? O1.26 x 1024…

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Q: empirical formula of tin (Sn) oxide,

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Q: For the following reaction, 41.2 grams of iron are allowed to react with 21.0 grams of oxygen gas.…

A: Given,the reaction:iron (s) + oxygen (g)  iron(III)oxide (s)mass of iron = 41.2 gmass of oxygen =…

Q: If ammonia, NH3, is burned in air, the following reaction takes place: 4 NH3 +3 02--> 2 N2 + 6H20 If…

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Q: The amino acid arginine has an approximate molar mass of 174 g/mole. If the percent composition is…

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Q: How many CO2 molecules are there in 12.0 moles CO2?   How many moles NH3 contains 1.5 x 10 23 NH3…

A: a) Given : Number of moles of CO2 = 12.0 mol.

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Mass of crucible = 26.639 g Mass of crucible + mass of Na2SO4·xH2O = 27.085 g Therefore mass of…

Q: For the following reaction, 5.32 grams of hydrogen gas are mixed with excess ethylene (C2H4). The…

A: The objective of the question is to calculate The theoretical yieldThe percent yieldThe maximum…

Q: Ascorbic acid is one form of vitamin C and is known to contain only carbon, hydrogen, and oxygen.…

A: Given,  The mass percent of Carbon = 40.91%  Hydrogen = 4.578% and Oxygen = 54.50% The mass of the…

Q: Ammonia, NH3, can be synthesized by this reaction:

A: Given,  Amount of NO is 45.8 g Amount of H2 is 12.4 g Formula Used,

Q: What number of molecules (or formula units) are present in 7.38 g of each of the following…

A: Given Data: 7.38g of (NH4)2Cr2O7   Formula:  No. of molecules = No. of moles x Avogadro Number…

Q: If 7.40 g of O3 reacts with 0.670 g of NO, a) b) Which compound will be the limiting reagent? How…

A: To solve this problem we have to consider the balanced chemical equation . We first calculate the…

Q: A chemist requires 0.737 mol Na,CO, for a reaction. How many grams does this correspond to?

A: grams= moles x atomic weight

Q: For the following reaction, 10.7 grams of phosphorus (P4) are allowed to react with 39.6 grams of…

A: Given, The mass of P4 = 10.7 g. The mass of Cl2 = 39.6 g. The molecular mass of P4 = 123.8 g/mol.…

Q: A major component of gasoline is octane (C8H18). When octane is burned in air, it chemically reacts…

A: The number of moles of a species is calculated by expression (1), in which, n is the number of…

Q: The reaction of 7.71 x 103 g of titanium (IV) chloride gas with 1.45 x 103 g of oxygen gas produces…

A: Titanium chloride reacts with oxygen to give titanium oxide and two moles of chlorine gas.

Q: For the following reaction, 12.7 grams of chlorine gas are allowed to react with 58.1 grams of…

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Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Since on heating the compound, the mass of water will be lost as it will get vaporised  Hence the…

Q: The analysis of a compound gives the following percent composition by mass: C: 56.70 percent; H:…

A: The molecular formula C13H23S1O4 is calculated from percentage composition and molar mass of…

Q: A mixture consisting of 11.3 g of calcium fluoride, CaF2, and 10.8 g of sulfuric acid, H2SO4, is…

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Q: complete reaction

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Q: In a chemical reaction, sulfur goes through a combustion reaction and produces sulfur trioxide as a…

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Q: Calculate the maximum mass in grams of nitrogen dioxide, NO2 (46.00 g/mol), that can form when 3.49…

A: A numerical problem based on mole concept that is to be accomplished.

Q: Consider the balanced chemical equation: 3 H₂(g) + N₂(g) → 2 NH₃(g) If 46.8 g H₂ and 179.4 g N₂ are…

A: The balanced chemical reaction for the reaction of nitrogen gas with hydrogen gas to give the…

Q: Example: Ammonia, NH3, can be synthesized by the reaction: 2 NO (g) + 5 H₂ (g) ->> 2 NH3 (g) + 2 H₂O…

A: Mass of NO = 86.3gMass of H2 = 25.6 g

Q: A sample of limestone and other soil materials was heated, and the limestone decomposed to give…

A: The solution is given below -

Q: For the following reaction, 11.2 grams of glucose (C6H12O6) are allowed to react with 15.5 grams of…

A: First we need to find the limiting reactant. It is the reactant that gets consumed first.   To find…

Q: A definiency in thhe vitamin nicotinamide results in the dietary deficiency disease pellagra,…

A: Given, the molecular formula for nicotinamide is C6N2H6O. We have to find the percent composition by…

Q: 0.333 g of a hydrocarbon (CxHy) was analyzed by combustion analysis and 1.009 g of CO2 (MM = 44.01…

A: We have to calculate the moles of carbon.

Q: Geosmin is an organic compound that is partly reponsible for the smell of soil. It has a molar mass…

A: 1st) Calculate the mass of C, H, O2nd) Calculate moles of C, H , O3rd) Calculate the empirical…

Q: Vitamin C, an antioxidant present in citrus fruits, contains only C, H, and O. Combustion of 10.0 g…

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Q: A major component of gasoline is octane  C8H18 . When octane is burned in air, it chemically reacts…

A: To find: Mass of octane consumed by the reaction of 7.6 g of oxygen gas.   Molar mass of Oxygen, O2…

Q: In measuring the sample that is placed into a SCUBA diver's tank it has the following gases: 52.00 g…

A: A numerical problem based on percentage concentration, which is to be accomplished.

Q: For the following reaction, 9.26 grams of benzene (C6H6) are allowed to react with 15.6 grams of…

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Q: A major component of gasoline is octane  C8H18 . When octane is burned in air, it chemically reacts…

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Q: Mole is the term used to express the quantities of substances involved in a chemical reaction. Mole…

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Q: Consider the following reaction: 4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(g) If a container were to have…

A: Interpretation- To determine the total molecule would be present in the container after this…

Q: Ammonia gas can be prepared by the following reaction: CaO(s) +2 NH,Cl(s) → 2 NH3 (g) + H, 0(g) +…

A: Given data :  Given mass of CaO = 184 g  Given mass of NH4Cl = 368 g  Theoretical yield of NH3= 112…

Q: If steel wool (iron) is heated until it glows and is placed in a bottle containing pure oxygen, the…

A: To solve this problem we have to use the given balanced chemical equations .  First we have to find…

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.