The mass of 0.22 mol of a molecule is 35.16 g. Identify the molecule.

Q: empirical formula

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Q: How many moles of theobromine are there in 5.72 x 1026 molecules of theobromine?

A: 1 mole of substance has Avogadro's number that is 6.022x1023 molecules or atoms NA = 6.022*1023…

Q: Analysis of a particular compound results in a mass percent composition of 57.14% C, 4.80% H, and…

A: From the CHN analysis we can calculate the empirical formula .

Q: An unknown compound contains only C , H , and O . Combustion of 9.00 g of this compound produced…

A: We have to calculate the empirical formula of the unknown compound

Q: molecular formula

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Q: Determine the empirical and molecular formula for a compound that gives the following percentages…

A: Assuming we have 1 mole of compound Hence mass of compound = 1 X molar mass = 98.96 g Since the mass…

Q: A sample contains 10.0 g C, 2.5 g H, and 5.0 g of O. Calculate the mass percent composition of…

A: Given: Mass of carbon in the sample = 10.0 g Mass of hydrogen in the sample = 2.5 g Mass of oxygen…

Q: A compound consisting of B, N, and H undergoes elemental analysis. The % composition by mass is…

A: Given,Percent of B in the compound = 40.28 %Percent of N in the compound = 52.20 %Percent of H in…

Q: An organic compound consists of Carbon, hydrogen and sulfur. Complete combustion of 3.50 g this…

A: The given compound consist of carbon, hydrogen and sulfur. We have to determine the empirical…

Q: The percent composition by mass of an unknown compound with a molecular mass of 120.104 u is 40.002%…

A: Given ; percentage of atoms

Q: Convert 4.18 x 1021 molecules/formula units of X4Z, into grams of the same compound. (Assume that…

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Q: A 1.7500 g sample of a zinc compound ("ZnX") contains 0.8400 g of zinc. What is the molar mass of…

A: Given the mass of the unknown compound, ZnX = 1.7500 g Given the formula of the unknown compound is…

Q: The number of moles in 37.80 g of C2H6O (molar mass = 46.1 g/mol) is?

A: Given information,       Mass of C2H6O is 37.80 g.     Molar mass of C2H6O is 46.1 g/mol.

Q: A compound has a molar mass belween 165 - 170g. the percentage composition by mass values are…

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Q: a) Determine molecules of C5H5N in 16.00 g of C5H5N (molar mass = 79.11g/mol). b) Explain how the…

A: a) Given : Mass of C5H5N = 16.00 g And molar mass of C5H5N = 79.11 g/mol.

Q: Determine the empirical formula of a compound with the following composition by mass: 18.0%C, 2.5%H,…

A: We have to predict the empirical formula.

Q: A sample is found to contain 66.8% NaHCO3 by mass. What is the mass of NaHCO3 in 4.25g of the…

A: Mass percent :- The mass of a substance present in 100 grams of sample is called its mass percent .…

Q: 8. Convert 37.482 g of N₂O4 to nitrogen atoms.

A: In one mole of any substance there are 6.023 * 1023 number of entities present.

Q: When 2.115 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 6.637 grams…

A: First of all we calculate the mass of Carbon in Carbon dioxide and mass of Hydrogen in water. Then…

Q: II. Empirical Formula 1. A compound contains 40.92 % C, 4.58% H, and 54.50% O by mass. What is the…

A: Determination of empirical formula The percentage composition of elements present in given compound…

Q: A compound with the empirical formula CH2CH2 has a molar mass of 112112 g/mol. What is the molecular…

A: Solution,  The above question belong to some basic concept of chemistry. Empirical formula is the…

Q: 3. A 29.8g sample of a compound is found to contain 10.5g C and 16.7 g fluorine , the rest is…

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Q: Describe how molecular formulas and structural formulas areused to represent the compositions of…

A: Molecular formulas and structural formulas are used to represent the compositions of molecules that…

Q: If a compound is composed of 6.2% Hydrogen, 39.5% Oxygen, 37.0% Carbon and 17.3% Nitrogen a.…

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Q: A 8.4877 g sample of a new compound has been analyzed and found to contain the following masses of…

A: To calculate the emperical formula,  the number of moles of each element should be calculated. Then…

Q: A sample of compound X is subjected to elemental analysis and the following percentages by weight…

A: Given   % C = 39.97 %  % H  =  6.73 %  % O  =  53.30  Empirical formula = ?

Q: 9. How many sodium ions are contained in 1.64 g of Na3PO4? The molar mass of Na₂SO3 is 163.94 g/mol.…

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Q: will

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Q: A chemist weighs 50.0 grams of solid NaOH. a) How many moles of NaOH are in the sample? [ Select ]…

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Q: A 3.013 g sample of MgNH4PO4* X H₂O is heated until all the water of hydration is driven off. The…

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Q: A metal has the mass  of 12.00 g and 5.850 x 1022 atoms.  Calculate molar mass of the metal.

A: Formula use is, no of moles = weight/ molar mass

Q: A 0.5998-g sample of a new compound has been analyzed and found to contain the following masses of…

A: Given, mass of sample of compound = 0.5998 g The sample contains, mass of Carbon (C) = 0.2322 g mass…

Q: If 2.332 g of a sample containing a mixture of CuO and CuCO3 are heated, the final weight of the…

A: CuCO3 on heating decomposes to form CuO and CO2 CuCO3 (s) →heat CuO (s) + CO2 (g) 123.55 g…

Q: A 1.000 g sample of an unknown compound containing only carbon, hydrogen, and oxygen was analyzed…

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Q: Part D. A 28.50 g sample of a compound of carbon, sulfur, hydrogen, and combusted (burned). 35.25 g…

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Q: Aluminium has a density of 2.70 | g/cm3 . How many moles of aluminum are in a 13.2 cm3 block of the…

A: Density :- Density of a substance is its amountof mass per unit volume . So , density is the…

Q: Determine molecular formula. An organic compound that only contains C, H, and O was subjected to…

A: Since the compound is made up of only C, H and O. Hence we can assume the empirical formula of…

Q: 20. How many molecules are contained in each of the following: (a) 1.75 mol Cl, (b) 0.27 molC,H,0…

A: Since you have posted a question with multiple sub-parts, we will solvefirst three sub- parts for…

Q: A sample of naphthalene was analyzed in the laboratory and it was determined that the sample…

A: Number of moles (mol) = Given mass (g)Molar mass (g/mol)Given that:Number of moles= 0.457 molesMolar…

Q: When 5.555 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 17.43 grams…

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Q: A compound is 7.7% (by mass) hydrogen and 92.7 % carbon. It has a molecular weight of 52 g/mole.…

A: Empirical formula are the formula which represent simplest ratio of an element present in a given…

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.