A sample of a compound is found to contain 21.82 g of carbon, 9.16 g of hydrogen, 20.42 g of oxygen, and 18.44 g of nitrogen. Calculate the percent by mass oxygen in this sample.

Q: The density of carbon tetrachloride is 1.59 g/mL. How many chlorine atoms are present in 55 mL of…

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Q: A compound is isolated from the rind of lemons that is found to be 88.14% carbon and 11.86% hydrogen…

A: We have to calculate the mass of C and H.

Q: Suppose you have a sample of sodium weighing 11.50 g. How many atoms of sodium are present in the…

A: Given,Sodium weight 11.50 gMolar mass of sodium 22.989769 g/ mole

Q: 1. Calculate the mass in grams of a single oxygen molecule, 02.

A: Molar mass of O2 is 32.0 g/mol  We have to calculate here mass of 1 molecule of oxygen i.e. O2

Q: A compound is 47.35% carbon by mass, 10.60% hydrogen by mass and 42.05% oxygen by mass. What is the…

A: Calculating empirical formula.

Q: i. How many atoms of oxygen are in 8.1 g CO,? j. How many atoms of hydrogen are in 5.0 g NH3?

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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: A 2.19 g sample of a compound consisting of carbon, hydrogen, oxygen, nitrogen, and sulfur was…

A: The mass of compound containing Carbon, hydrogen, oxygen, nitrogen and sulfur combusted in excess…

Q: A given sample of a xenon fluoride compound contains molecules of a single type XeFn , where n is…

A: Given that 8 x 1020 molecules of XeFn weigh 0.225 g 6.022 x 1023  molecules of XeFn will weigh=6.022…

Q: A 3.000 g sample of a gaseous compound was found to contain 2.560 g of carbon and  0.440 g of…

A: To answer this first of all we have to convert grams into moles and we have to determine the simple…

Q: A compound of iodine and cesium contains 63.94 g of metal and 61.06 g of nonmetal. How many grams of…

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Q: How many grams of iron are combined with 45.1 grams of oxygen to make the iron(II) oxide compound?

A: Balanced reaction taking place is as follows: Molar mass of Fe = 55.845 g/mol Molar mass of O2 = 32…

Q: Calculate the number of atoms of chlorine in a 6.56×106 g6.56×106 g sample of chlorine.

A: We know,  Avogadro number of atoms are present in 1 moles of a compound .The Avogadro number is…

Q: atter.) 115 g of methane is reacted with an equal mass of sulfur.

A: In balanced chemical reaction number of atoms of each element in product side is equal to number of…

Q: A sample of hydrogen sulfide, H2S, has a mass of 56.75 g. Calculate the number of hydrogen sulfide…

A: Number of molecules can be calculated by using following formulaNumber of molecules = moles ×…

Q: A sample of trifluoroacetic acid, C,HF,O2, contains 62.1 g of oxygen. Calculate the mass of the…

A: The mass of oxygen in the trifluoroacetic acid, C2HF3O2 is = 62.1 g The mass of the trifluoroacetic…

Q: A sample of hydrogen sulfide, H2S, has a mass of 57.25 g. Calculate the number of hydrogen sulfide…

A: Given data,Mass of H2S=57.25gMolar mass of H2S=34.1g/mol

Q: What is the percent by mass of chromium (atomic mass = 52.00 g/mol) in Cr2S3 (mm = 200.20 g/mol)?…

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Q: What is the percent by mass N in Magnesium Nitrate?

A: Atomic mass of N =  14 g mol-1 Molar mass of Magnesium Nitrate (Mg(NO3)2) = 148.3 g mol-1

Q: A mixture of NaCl and NaBr has a mass of 2.00 g and contains 0.75 g of Na. What is the mass of NaBr…

A: Mass of NaCl is X and Mass of NaBr is Y Hence, X+ Y = 2 gm ……(1)   and  X = 2 - Y But, % Na = Mass…

Q: Phosphorus has the molecular formula P4, and sulfur has the molecular formula S8. How many grams of…

A: Given Number of molecules of P4 = number of molecules of S8 moles of P4 = moles of S8   mass of…

Q: A 25.75 g sample of nitrogen oxide was found to contain 6.68 g of nitrogen and the rest oxygen…

A: Compound is made of N and O only. So Nitrogen oxide mass is given and nitrogen mass is given then…

Q: A 36.41-g sample of calcium carbonate (CaCO3 ) contains 14.58 g of calcium and 4.36 g of carbon.…

A: Given data: Mass of CaCO3 sample = 36.41 g Mass of calcium = 14.58 g Mass of carbon = 4.36 Formula…

Q: Determine the mass (in grams) of aluminum present in 1.07 grams of Al2S3? Do not type units into…

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Q: Convert between moles and numbers of atoms. A sample of lithium contains 2.24x1025 Li atoms. What…

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Q: 4.00 g sample of a compound was analyzed and found to contain 1.54 g of silicon and the rest was…

A: The simplest formula of compound , which represent lowest whole number ratio of elements present in…

Q: How many kilograms of AICI3 can be made from 150 kg of chlorine

A: The balance chemical equation for reaction of Al with with Cl2 gas is as follow…

Q: Many grams of sodium contain the same number of atoms as 10.9 g of potassium? (Dimensional analysis)

A: Given that,  Weight of potassium = 10.9 g Moles of potassium in 10.9 g = 10.9 g/39.0983 g/mol =…

Q: The black powder used to propel each firework into the sky made up of 75% by mass potassium nitrate,…

A: Given, 75% by mass potassium nitrate15% by mass charcoal10% by mass sulphur65.0 grams of charcoal

Q: A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to…

A: Given data, The overall mass of the gaseous compound = 24.81 g Mass of carbon = 3.01 g Mass of…

Q: Determine the number of moles in 234 g of F,

A: Given  Mass of F2                 = 234 gram  Number of Moles   = ? Molar mass of F     = 19 gm/mole…

Q: The black powder used to propel each firework into the sky made up of 75% by mass potassium nitrate,…

A: Black powder contains 75% by mass potassium nitrate, 15% by mass charcoal, and 10% by mass sulfur.

Q: calculate the mass of 600. atoms of nitrogen

A: The molar mass of any substance is the mass of 1 mole of that substance. The unit of molar mass is…

Q: A 0.500 g sample of tin foil reacted with oxygen to give 0.635 g of product. (a) What is the…

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Q: 10 gram sample of which substance contains the greatest amount of hydrogen atoms A. 10gCH4…

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Q: Analysis of a 12.04-g sample of a liquid compound composed of carbon, hydrogen, and nitrogen showed…

A: Mass percent of a compound is given by, Mass percent = Mass of the elementTotal Mass×100

Q: Calculate the mass of nickel that could be obtained from 3.45x1025 f. units of Nickel (III) oxide.

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Q: Identify the substance based on the mass. Gold (0.241 g). Calculate how many atoms the substance…

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Q: A newly synthesized compound has the molecular formula ClF2O2PtF6. Compute, to four significant…

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Q: What mass of iron(III) oxide must be used to produce 64.28 g of iron? What is the maximum mass of…

A: The equation required to produce iron from iron(III)oxide is as follows, Given grams of iron is…

Q: The molecular formula of hexakis(methylthio)benzene is C12H18S6. What is the percentage (by mass) of…

A: We have to calculate the % by mass of C in hexakis(methylthio)benzene .

Q: Chromium metal is obtained by heating chromium(111) oxide with carbon.Calculate the mass percentage…

A: By the help of stoichiometric coefficient we can find the amount of unknown substance by the help of…

Q: A sample of hydrogen sulfide, H2S, has a mass of 30.50 g. Calculate the number of hydrogen sulfide…

A:

Q: If a sample of iron(III) sulfide contains 5.00x10^15 iron atoms, what is the mass of the sample in…

A: Given,  No. of Fe atoms = 5.00×1015 atoms of Fe molar mass of Fe2S3 = 207.9 g mol-1 mass of Fe2S3 =…

Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

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Q: 7. A compound contains 30.4 g of nitrogen and 69.6 g of oxygen by mass. What is the chemical formula…

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Q: To prevent the presence of air, noble gases are placed over highly reactive to act as inert…

A: The partial pressure of a gas in a mixture of gases is equal to the total pressure multiplied by the…

Q: The average mass of one atom of carbon is 2.00 x 10 –23 g. How many carbon atoms are present in a…

A: Given:Mass of one atom of carbon = 2.00 x 10 –23 g.Total mass of sample of carbon = 40.0 g.

Q: y grams of O,

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.