. He can tell from elemental analysis that the polymer is made up of only three elements: carbon, hydrogen, and oxygen. By mass, it’s 56.45 % carbon and 5.93 % hydrogen, with the rest of the mass made up of oxygen. What is the empirical formula of this polymer

Q: A 19.00 kg sample of an unknown compound contains 0.06 kg of hydrogen, 11.01 kg of gold, 7.93 kg of…

A: Percent composition of any element in a compound is given by the following expression        percent…

Q: Naturally occurring chlorine is 75.78% 35Cl (atomic mass 34.969 u) and 24.22% 37Cl (atomic mass…

A: Given :  Atomic mass of lighter isotope i.e 35Cl (A1) = 34.969 u  Percentage abundance of lighter…

Q: When 1.449 grams of a hydrocarbon, C,Hy, were burned in a combustion analysis apparatus, 4.441 grams…

A: The empirical formula represents the smallest number of each element in a compound, which is…

Q: Using scanning tunneling microscopy, scientists at IBM wrote the initials of their company with 35…

A: The product of the number of moles and Avogadro's Number is equal to number of particles in a…

Q: 2. A sample of a substance containing only carbon, hydrogen, and oxygen has mass x in grams. It is…

A: The equation for the burning of carbohydrate is: x12a+b+16c CaHbOc  +  O2   →    y44CO2  +  Z18…

Q: If the sample has a molar mass of 176.0 g/mol, what is the molecular formula of the sample?

A:

Q: A sample of monochloro pentaborane (9), B5H8Cl, has a mass of 20.7 g. What amount, in moles, does…

A: Chemical formula of monochloro pentaborane = B5H8Cl.Above compound contains B, H and Cl atom.

Q: A compound of potassium had the following percentage composition: K 28.73%; H 1.481%; P 22.76%. The…

A:

Q: An unknown compound has the following chemical formula: PtCl, where x stands for a whole number.…

A:

Q: Aluminum reacts with oxygen to form aluminum oxide, Al2O3.  Set up the calculation and solve for the…

A: The balanced chemical equation that describes the formation of aluminum oxide can be shown as…

Q: 3.43 x 10^24 Co atoms

A: Answer :. In one mole of Co the number of atoms = 6.023 × 1023 . Then in 5.699 mole of proton is…

Q: You have 28.83 liters of oleic acid. Find the number of molecules in this sample. Oleic acid has a…

A:

Q: An Organic compound contains 59.00% by mass C, 7.15% by mass H, 7.65% by mass N, and 26.20% by mass…

A:

Q: You have a compound containing 15.32 % silicon, 49.76% Zr (Z = 40), and 34.91 % oxygen.  What is the…

A: Given , Silicon = 15.32 % Zirconium = 49.76 % Oxygen = 34.91 %

Q: A sample of oxygen gas weighs 28.4 g. How many atoms of oxygen are present in this sample? The…

A: Here we have told that a sample of oxygen gas is weighed at 28.4 g. Now we have to tell how many…

Q: The empirical formula of propylene is CH2. An experimental determination of the molar mass of…

A: Let the number of carbon atoms be n and the number of hydrogen atoms be 2n in the molecular formula…

Q: A chemist decomposes samples of several compounds; the masses of their constituent elements are…

A: In order to calculate the empirical formula of each compound , we first need to convert the grams of…

Q: · Calculate the molar mass of each of these compounds and the mass percent of each element. a) PbS,…

A: Given : Compound is PbS. Each molecule of PbS contains, 1) 1 atom of Pb 2) 1 atom of S Hence the…

Q: Elemental analysis of a compound with molar mass 214.22 g/mol gives the following mass percent…

A: Given data,Percent of C=72.89%Percent of H=4.71%Percent of O=22.41%Molar mass of…

Q: Calculate the mass (in g) of 1.2 x 1024 atoms of molybdenum, Mo.

A: using mole concept , easily determination of atoms , molecules and ions possible.

Q: Diamonds are a crystalline form of pure carbon, and their mass is measured in units of carats (1…

A: Given: Mass of diamond = 84.37 carat And 1 carat = 200 mg = 0.200 g…

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: 1- First calculate the moles of compound XBr3  moles of XBr3 = ( moles of Br ) / 3  moles of XBr3 =…

Q: A compound containing chromium, Cr; chlorine, Cl; and oxygen, O, is analyzed and found to be 33.6%…

A:

Q: Some of the formulas could be either molecular or empirical formulas; however, some can only be…

A:

Q: When 4.993 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 15.67 grams…

A:

Q: Which of the following formulas—NO, N 2 O, N O 2 , N 2 O 4 ,and N 2 O 5 —represent the empirical and…

A: NO2 and  N2O4 represent the empirical formula and molecular formula of the same compound. Empirical…

Q: A student is running an experiment in which 48.1 grams of MgBr2 is needed, but the only jar of…

A: Given Mass of MgBr2 needed = 48.1 g

Q: 12. The complete combustion of acetylene (C₂H2) is described by the following reaction: C,Hz + Oz →…

A: Q.12 The given equation of combustion of acetylene is: C2H2+O2→CO2+H2O

Q: 6.90 x 1024 formula units of sodium nitrite, NaNO₂ Express your answer with the appropriate units.…

A: Multiple  questions

Q: Sulfuric acid is a component of acid rain formed when gaseous sulfur dioxide pollutant reacts with…

A: Gaseous sulfur dioxide reacts with gaseous oxygen and liquid water to form aqueous sulfuric acid.…

Q: 2. What is the mass (in grams) of 7.11 X 102 molecules of tetraphosphorous trisulfide?

A: Given, number of molecules = 7.11×1022 Avogadro's constant = 6.022×1023 molecules.mole-1

Q: A laboratory analysis of an unknown sample yields 73.13% carbon, 7.38% hydrogen, and 19.49% oxygen.…

A:

Q: cond A B C D sketch of molecules in it H H C1O H-Ö C нӧ- H H :O: H H H-Ö H-Ö C H C || :0: C O: 010…

A: first, we have to find empirical formula of the given compounds

Q: Maggie filtered out a sample of copper (II) chloride, CuCl2 from a local pond, and found its mass to…

A:

Q: compound containing Sodium, Chlorine, and Oxygen is 25.42% Sodium by mass. A 3.25-gram sample gives…

A:

Q: Tartaric acid is the white, powdery substance that coats sour candies such as Sour Patch Kids.…

A: To solve this problem first we find the mass of C , H and O  Then the number of mole of each to get…

Q: Stoichiometry, in chemistry, the determination of the proportions in which elements or compounds…

A: Following information given -  Mass of Magnesium = 50.0 g  Mass of copper (II) nitrate = 50.0 g

Q: natural rubidium has the average mass of 85.4678 AMU and is composed of isotopes Rb 85 (mass =…

A: Average atomic mass = ∑i=1XiMiWhere X = mole fraction of the isotope and M is the mass of the…

Q: Which of the formulas must be molecular formulas? O C̟H¸N,0 C,H¸O, CH,0 O PO РО 10

A: Emperical formula is that way representing the chemical fourmla in which elements are present in…

Q: A 2.25 g sample of titanium metal is burned in an oxygen atmosphere to produce 3.75 g of a titanium…

A: Given that the mass of Titanium is 2.25 g and the mass of oxide is 3.75 g of Titanium oxide. The…

Q: If you had 21.5 moles of silicon, how many atoms would you expect to have? And If you had 5.69 x…

A:

Q: the complete reaction of 16.12 g of titanium with 16.152 g of carbon produces a compound with the…

A: Mass of titanium(Ti) reacted = 16.12 g  Mass of Carbon(C) reacted = 16.152 g  In order to find the…

Q: Elemental analysis of a 60.00 g sample of a molecular compound used as a drycleaning fluid finds…

A: A sample of a compound used as a dry cleaning fluid is found to containmass of carbon (C) = 10.80…

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.