A 2.00 g sample of unknown hydrocarbon is found to contain 1.50 g carbon and 0.50 g hydrogen. What is the compoun percent composition by mass?

Q: Describe how the knowledge of the percent compositionby mass of an unknown compound can help us…

A: Percent (%)composition by mass helps us in identification of the compound by comparing the relative…

Q: Write the chemical formula for 1 mol of compound X containing 2 mol Al and 3 mol O.   X= ?

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Q: When 2.750 g of the oxide of lead is stronglyheated, it decomposes and produces 0.0640 g of oxygen…

A: The determination of the simplest form of a compound is called its empirical formula. It is…

Q: Arsenic reacts with oxygen to form a compound AsxOy. If 2.354 g of arsenic forms 3.611 g of the…

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Q: The percent by mass of potassium in KOH is  The percent by mass of nitrogen in CH5N is %.

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Q: A student obtained the following mass composition of a compound: C: 50.89% H: 8.51% O: 40.60%. The…

A: Given Percentages carbon = 50.89 ℅ hydrogen = 8.51 ℅ oxygen = 40.60 ℅

Q: sodium chloride is 60.66% chlorine by mass what is the mass % of sodium in sodium chloride?

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Q: calculate the percent of water in the copper (II) sulfate n hydrate by mass. Pentahydrate mass=…

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Q: How many molecules are contained in a 51g sample of water?

A: mass of sample of water (H2O) = 51 gNumber of water (H2O) molecules = ?Note:molar mass of water…

Q: Calculate the mass percent of chlorine in CCl6

A: Mass percent is a percentage of amount of an atom in the given molecule.  The mass percent of…

Q: . Determine the empirical formula of a compound with the following mass percent composition: 8.88%…

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Q: Analysis of a 29.1 g sample of water revealed a mass percent for lead of 4.35%. Calculate the number…

A: Mass percent of lead is equal to the mass of lead divided by the mass of water multiplied by 100.

Q: A compound is composed of 81.72% Carbon and 18.28 % Hydrogen, by mass. What is the empirical…

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Q: The percent by mass of copper(I) in CuCH3COO is?

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Q: What is mass percent of hydrogen in nonane?

A: Nonane is a long chain aliphatic hydrocarbon compound which contains nine carbons. # From the…

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: Determine the mass percent in the hydrate

A: A hydrаte  is  а  substаnсe  thаt  соntаins  wаter  оr  its  соnstituent  elements in the physical…

Q: 6. Determine the percent composition of magnesium nitrate.

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Q: What is mass percent composition? Why is it useful?

A: Mass percent composition refers to the mass of the component in 100 g of the solution.

Q: An elemental analysis of a compound containing S and O produce 50.00 % S and the rest is oxygen.…

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Q: How many molecules are in 3.87 moles of CC?

A: The number of molecules present in 3.87 moles of CCl4 given below.

Q: How many total atoms are in 0.870 g of P,0,?

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Q: completely

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Q: A 4.560 g sample containing impure CuCl2x2H2O was heated to constant mass. The sample mass after…

A: Here, impure sample of CuCl2.2H2O heated to drive off all the water then the mass of the mixture is…

Q: Caculate the number of moles in 0.220 g of calcium carbonate.

A: Number of moles of a particular substance or compound can be calculated by dividing the given mass…

Q: 81.77 moles of methane to molecules

A: Given: Moles of methane = 81.77 mol.

Q: One mole of hydrogen peroxide, H2O2, would consist of how many molecules?

A: Given : Moles of H2O2 = 1 mol

Q: What is the molecular formula for the following bond-line structures? H,

A: Molecular formula can be described as the way to represents the proportion of atoms that constitute…

Q: Consider a 23.5 g sample of the compound diphosphorus pentabromide Using the formula P.Br, determine…

A: Given, Chemical formula of diphosphorus pentabromide: P2Br5 Molar mass of diphosphorus pentabromide…

Q: What is the percent composition by mass (to one decimal place) of Oxygen and hydrogen in 1 mol of…

A: The mass of 1 mol of atoms is called atomic mass For example :-  Atomic mass of H = 1.0 g/mol Atomic…

Q: The percent by mass of nitrogen for a compound is found to be 46.7%. Which of the following could be…

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Q: How many total atoms are present in 47.140 g of HCl?

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Q: Arsenic reacts with oxygen to form a compound AsxOy. If 2.354g of arsenic forms 3.611g of the…

A:

Q: How many total atoms are in 0.870 g of P,0,?

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Q: What mass of CCl4 contains 7.0x1026 molecules of CCl4

A:

Q: There is a series of nitrogen oxides that have the general formula NxOy.  What is the empirical…

A: Given :-  General formula of nitrogen oxide = NxOy  Percent composition by mass of N = 25.94%  To…

Q: Determine the empirical formula of a compound that contains only C, H and O. This compound is…

A: Given : Mass percent of C = 75.9 % Mass percent of H = 8.80 % And mass percent of O = 15.51 %

Q: A sample of pure silver has a mass of 15.4 g. Calculate the number of moles in the sample and silver…

A: Given-> Mass of Silver = 15.4 gm

Q: A sample of hydrate of copper(II) sulfate is found to contin 36.08% by mass water. What is the…

A: Molar mass of copper sulfate = 159.6 g/mol Molar mass of water molecule = 18 g/mol Molar mass of…

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.