a chemist determines that 1.26 g of iron reacts with 0.54 g of oxygen to form rust. What is the percent composition of each element

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: A beaker contains 5.75 x 1024 molecules of ethanol. How many moles of ethanol are there in a beaker?

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Q: Under certain conditions, the substances nitrogen monoxide and oxygen combine to form nitrogen…

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Q: empirical formula

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Q: A chemical analysis of 50.00 g of a compound of chromium and silicon shows that the compound…

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Q: A 3.75-gram sample of limestone, CaCO3, contains 1.50 g of calcium and 0.450 g of carbon. What is…

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Q: Calculate the number of atoms in 12.45 grams of iron. 1.342 x 1023atoms 1.342 x 1022toms 0.223 atoms…

A: Given information, Given mass of iron = 12.45 g Molar mass of iron = 55.845 g/mol Calculate : Number…

Q: If 4.41 g of nitrogen react with 2.00 g of hydrogen to produce ammonia, what is the limiting…

A: The reaction taking place is: 3H2  +  N2  →  2NH3 In general, 3 moles of H2 reacts with 1 mole of N2…

Q: If 10.11 g of limestone decomposes by heat to give 8.51 g of solid calcium oxide and carbon dioxide…

A: Limestone is a type of carbonate sedimentary rock which is composed 0of the minerals calcite and…

Q: When 8.60 g of calcium are heated in air, 10.60 g of calcium nitride are formed. What is the…

A: We are given that 8.6 g of calcium is heated to produce 10.6 g of calcium nitride, the reaction can…

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

A: The combustion reaction of octane i.e C8H18 can be written as, => C8H18 + O2 --------> CO2 +…

Q: A compound has the chemical formula SrX2, where X is an unknown nonmetal. The percent by mass of Sr…

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Q: A 18.2 g of iron metal reacts with excess oxygen gas to produce 47.9 g of Fe3O4. The reaction…

A: Fe + O2 -------> Fe2O3

Q: Fluoride ion is added to drinking water to prevent tooth decay. What is the mass in grams of sodium…

A: Given Formula units = 1.19 × 1019

Q: If 1.23 x 1024 molecules of a substance have a mass of 68.2 g, what is the molar mass of the…

A: Given Data: The mass of the substance is 68.2 g.

Q: An oxide of mercury will thermally decompose when heated. A 0.204 gram sample of the mercury oxide…

A: Percentage of mercury present in the sample is: Percentage of oxygen present in the sample is:…

Q: A binary compound of carbon and hydrogen has the following percentage composition: 82. 66% carbon,…

A: Given a binary compound of carbon and hydrogen. Carbon % = 82.66 %Hydrogen % = 17.34 %

Q: The percent composition of hydrogen in a compound is 3.80%. How many grams of hydrogen are in 124 g…

A: Mass percent :- The mass of an element present in 100 grams of the compound is called mass percent…

Q: How many moles are in 95.0 g of Al?

A: number of moles = mass/molar mass  molar mass of Aluminium = 26.98 g/mol

Q: A 100.00 g sample of the compound XCl3 is decomposed to produce 90.77 g of the element chlorine.…

A: The reaction taking place will be  2 XCl3 -----> X2 + 3 Cl2  Hence moles of Cl2 formed / moles of…

Q: If you have an 8.53 mg sample of phosphorus oxychloride and it contains 1.72 mg of phosphorus, what…

A: Mass of POCl3 = 8.53 mg Mass of P = 1.72 mg

Q: A sample of a compound is found to contain 21.82 g of carbon, 9.16 g of hydrogen, 20.42 g of oxygen,…

A: Mass of compound is,

Q: If 60.2 grams of Hg combines completely with 24.0 grams of Br to form a compound, what is the…

A: Given, Mass of Hg = 60.2 grams Mass of Br = 24.0 grams Percent composition is defined as the percent…

Q: the analysis of a compound shows that it contains 5.4 mol c, 7.2 mol h, and 1.8 mol n. what is the…

A: Empirical formula: The empirical formula of a compound is defined as the ratio of the simple…

Q: In an experiment, 3.2 moles of oxygen atoms reacted with 121.3 g of calcium to form a new compound.…

A: Atomic mass of oxygen atom = 16 g/mol  moles of oxygen atoms =3.2 moles  mass of oxygen atoms = 3.2…

Q: 4. Convert 2.34 moles of Al(NO), to grams.

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Q: What conversion factor would you use to convert 72.9 g Cl to moles of Cl?

A: given, the mass of Cl = 72.9 g the molar mass of Cl = 35.5 g.mole-1

Q: If 2.21 grams of strontium combines with 1.79 grams of chlorine to form a chloride, calculate the…

A: If 2.21 grams of strontium combines with 1.79 grams of chlorine to form a chloride, the percent…

Q: A compound is known to contain 65.44% carbon and 19.36% oxygen by mass. Each molecule contains two…

A: In a 100 g of compound, 65.44% carbon and 19.36% oxygen is present by mass. By determining the…

Q: Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution…

A: Given: Mass of sodium carbonate i.e. Na2CO3 = 4.25 g.And mass of silver nitrate i.e. AgNO3 = 5.50…

Q: How many grams of carbon are in 368.3 g of carbon tetrachloride? mass:

A: Mass of carbon tetrachloride = 368.3 g  Mass of carbon = ?

Q: How many moles of copper are in a 13 cm piece of wire weighing 1.109 grams?

A: The number of moles of any substance is defined as the ratio of given mass of that substance to that…

Q: In a combustion reaction, 32.4 g of hydrocarbon reacts with 96.0 g of oxygen to produce water and…

A: Given :- Mass of Hydrocarbon = 32.4 gram Mass of oxygen = 96.0 gram Mass of water = 60.6 gram To…

Q: 4.25 x 1024 atoms N converted to grams

A: We have given the atoms of nitrogen = 4.25 × 1024 atoms Avogadro's constant = 6.022 × 1023…

Q: A 69.5 g69.5 g sample of the compound X3O4X3O4 contains 19.2 g19.2 g of oxygen atoms. What is the…

A: First Calculate mas percent of oxygen in compound   Total mass of oxygen in sample is 64g  Then need…

Q: A gas sample contains 16.0 g of CH4, 16.0 g of O2, 16.0 g of SO2, and 33.0 g of CO2. What is the…

A: Stoichiometry is mainly based on the calculation of moles and volumes. These two values are used to…

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.