For thousands of years the mineral chalcocite (pronounced KAL-kuh-site) has been a highly prized source of copper. Its chemical composition is 79.85% Cu and 20.15% S. What is the empirical formula of chalcocite?

Q: A 125.6 mg sample of an organic compound containing only carbon, hydrogen, and nitrogen is combusted…

A: Answer The empirical formula is C3H8N The molecular formula is C6H16N2

Q: When 1.849 grams of a hydrocarbon, C,Hy, were burned in a combustion analysis apparatus, 6.249 grams…

A: Combustion reaction involves the reaction of the compound with oxygen. Combustion of hydrocarbon…

Q: An ionic compound MX3 is prepared according to the following unbalanced chemical equation.   M  +…

A: The number of moles of X2 (nX) is calculated using equation (1) in which N is the number of…

Q: 1. A platinum (II) compound , which is used to treat tumors, contains 65.0% Pt., 23.6% Cl, 9.35% N,…

A: As you have asked multiple question we will solve the first one for you .If you want answer to a…

Q: Malonic acid is used in the manufacture of barbiturates (sleeping pills). The composition of the…

A: To calculate the mole of each elements present in Malonic acid: Given: 34.56 % of C, 3.9 % of H, and…

Q: The rotten smell of a decaying animal carcass is partially due to a nitrogen-containing compound…

A: If the total amount of given substance is 100 g than 54.50 g of carbon, 13.73 g of H, and 31.77 g of…

Q: There is 45% oxygen, 33% sodium and 22% sulfur. What is the empirical formula

A: 45% oxygen 33% sodium 22% sulfur We have to find the empirical formula.

Q: Hydrogen cyanide, HCN, is prepared from ammonia, air, and natural gas (CH4) by the following…

A: To calculate the number of moles, we use the equation:       .....(1) Given the mass of ammonia =…

Q: What mass of iron (III) oxide is produced when 3.88 X 1025 grams of oxygen reacts with excess…

A:

Q: The elemental composition of the welding gas acetylene (C2H2) is 92.24% C and 7.76% H by mass. What…

A: Since from the formula of acetylene, we can say that the number of atoms of C and H are same in it.…

Q: What is the empirical formula of a compound that contains 63.25% Xe and 36.66%F by mass?

A: Empirical formula :-  The simplest formula which shows only relative number of different atoms…

Q: The compound noradrenaline contains 56.80% C, 6.55% Н, 28.37% О, and 8.28% N by mass. What is the…

A: To solve thia problem we have consider that mass of given compound is 100 g  Then according to the…

Q: One of the salts that scientists have found on Mars that supports the idea that water once flowed on…

A: Percentage composition :- The mass percent of each element present in the compound is known as…

Q: What is the empirical formula and what is the molecular formula for a substance consisting of 24.44%…

A:

Q: What is the empirical formula of the compound containing 55.8% carbon, 7.0% hydrogen, and 37.2%…

A: Given is, 55.8% carbon, 7.0% hydrogen, and 37.2% oxygen by mass

Q: A compound is composed of element X and hydrogen. Analysis shows the compound to be 80% X by mass,…

A: Given data :- A compound is composed of element X and hydrogen. Analysis shows the compound to be…

Q: How many moles of Al are necessary to form 83.0 g of AIBR, from this reaction: 2 Al(s) + 3 Br,(1) →…

A: For the reaction: 2Al     +   3Br2 →  2AlBr3 2 mol        3 mol         2 mol Given : Mass of AlBr3…

Q: Uranium is used as a fuel, primarily in the form of uranium(IV) oxide, in nuclear power plants. A…

A:

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: Hydrogen cyanide, HCN, is prepared from ammonia, air, and natural gas (CH4) by the following…

A: Limiting reactant :-  A reactant which is present in lesser number of moles than required as per…

Q: A 5.17 g sample of a compound with the formula CxHyOz is combusted and yields 13.0 g CO2 and 2.29 g…

A:

Q: It is NOT an example of an empirical formula. A. CH4 B. CeH12

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: A 0.812 g sample of a compound containing carbon, hydrogen and oxygen was burned in air to produce…

A:

Q: Titanium(IV) oxide is heated in hydrogen gas to give water and a new titanium oxide, TixOy . If…

A: Given:Mass of TiO2 = 1.598 g.Mass of TixOy = 1.438 g.

Q: The active ingredient in a common treatment for upset stomach is sodium bicarbonate, NaHCO3.…

A: Calculate the percent, by mass, of carbon in sodium bicarbonate.

Q: 1252. An unknown organic compound weighing 1980 mg is fully combusted at high pressure, yielding of…

A:

Q: The molecular formula for dinitrogen tetraoxide is N,O,. Is this the empirical formula for this…

A: The empirical formula can be defined as the simplest whole-number ratio of all the atoms present in…

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

A: Heating limestone and other soil samples revealed calcium oxide and carbon dioxide. The balanced…

Q: A 125.6 mg sample of an organic compound containing only carbon, hydrogen, and nitrogen is combusted…

A:

Q: 3.01 x 1023 molecules of sucrose is _ _ _ _ _ _ _ _ _ _ _ _ _ moles of sucrose.  Why don’t you need…

A: Given : Number of molecules of sucrose = 3.01 X 1023 molecules.

Q: What is the empirical formula of a compound containing 40.0% C, 6.71% H, and 53.28% O?

A: In chemistry, the empiric formula of a chemical compound is the shortest positive integer ratio of…

Q: You are trying to determine the formula for hydrated CaSO4 and you found the following: Mass of…

A: Given: Mass of hydrated compound = 3.09 g Mass of only CaSO4 = 2.43 g  So the mass of water present…

Q: a. A piece of iron metal with a mass of 42.5g is burned in the presence of oxygen. The resulting…

A:

Q: 5.) The composition of a compound containing Cd, P, and O, is 63.94% Cd and 11.80% P (by mass). What…

A:

Q: Benzoic acid is a crystalline powder used as a food preservative. It contains 68.8% C, 5.00 % H, and…

A: Given : We have to calculate the empirical formula.

Q: Q9. Nitrogen is a highly reactive element and has many forms of oxides and nitrogen content of these…

A:

Q: 5.) The composition of a compound containing Cd, P, and O, is 63.94% Cd and 11.80% P (by mass) What…

A: Given: Mass % of Cd = 63.94 % Mass % of P = 11.80%

Q: A combustion analysis of a 0.503 g sample of an unknown hydrocarbon yields 1.53 g CO and 0.756 g HO.…

A: Please find your solution below : Empirical formula of a compound is a formula that shows the…

Q: Acrylonitrile (C3 H3N) is the starting material for many synthetic carpets and fabrics. It is…

A: First we have to determine the limiting reagent. Limiting reagent is that which consumed first or…

Q: How many moles of Al are necessary to form 71.2 g of AIBR, from this reaction: 2 Al(s) + 3 Br,(1) –→…

A:

Q: What is the Empirical formula for C,H,,0; ? CHO CH,02 CH,0 C,H20,2

A: The given molecular formula is C6H12O6. Empirical formula is the simplest ratio of the elements…

Q: If 3.72g of iron oxide compound contains 1.12g of oxygen, what is the empirical formula of the…

A:

Q: 1.Ibuprofen is a compound used in painkillers. When a 2.174 g sample is burned in an excess of…

A:

Q: An organic acid contains 40.92% C, 54.50 % O, 4.58 % H, by mass. The molecular mass is 176 g/mole.…

A: We have given that  Molar mass = 176g/mole  Percent composition of C = 40.92%  Percent composition…

Q: Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,…

A:

Q: Compound Z is a chemical naturally found in peppermint and other mint plants and has mild anesthetic…

A:

Q: The chemical formula of blue crystalline substance of hydrated penta-aqua copper II sulphate is…

A: Molecular formula: CuSO4.5H2O Chemical formula: CuH10O9S Molar mass of CuSO4.5H2O = 64 + 10 x 1 + 9…

Q: What is the empirical formula for a compound made of 3.25 g of carbon and 8.85 g of oxygen?

A: Given  Mass of Carbon      = 3.25 gram mass of Oxygen     = 8.85 gram Empirical Formula  = ? Molar…

Q: What is the empirical formula of penicillin F?

A: Given: Carbon=53.827% Hydrogen =6.453% Nitrogen =8.968% Sulphur=10.27% Oxygen=20.482% Formula used:…

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.