Opal is a hydrated form of silica. If a laboratory analysis of a sample of opal reveals it to contain 29.2% Si, 33.3% O, and 37.5% HO, what is its empirical formula?

Q: 3) What is the mole of 6.022 x 10 molecules of CO, ? A) 2 B) 3 C) 1 4) What is the molar mass of CO,…

A: 3) In this question we want to determine the moles of CO2  We know that,  moles of CO2 = ( molecules…

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g) to an aqueous solution…

A: Given reaction is

Q: Consider the following four formulas: SO2, B2H6, CO, C4H2O2. Which of these formulas could be (a)…

A:

Q: An organic compound has an empirical formula CH2 and a molar mass of 112.21 g/mol. How many H atoms…

A: an empirical formula CH2  empirical mass = (12 x 1 ) + (1 x 2)= 14  n = molar mass / empirical mass…

Q: What is the empirical formula of a compound composed of 21.7 g21.7 g of potassium (KK) and 4.44…

A: Given:Mass of potassium = 21.7 gMass of oxygen = 4.44 g.

Q: The molar mass of M(OH)2 formed by the hypothetical metal M, is 144.096 g/mol what is the molar mass…

A: Molar mass of a compound is equal to the sum of the molar masses of all the elements. The molar mass…

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: Calculate the empirical and molecular formulas of a compound from percentage composition and…

A: Let us solved the problem by taking an example accordingly. Let us suppose a sample has 45% of…

Q: 2. A compound was analyzed and found to have the following percentage composition by mass: Cu:…

A: Given composition of compound : Cu= 49.73% P= 16.28 % O= 33.99 %

Q: [References] A sample of limestone and other soil materials was heated, and the limestone decomposed…

A: Calcium carbonate decomposes into calcium oxide and carbon dioxide. The equation for the balanced…

Q: A: What is the correct chemical formula when Co4+ combines with S2- ?  B:  How many ATOMS of OXYGEN…

A: A: What is the correct chemical formula when Co4+ combines with S2-?

Q: perchlorate is a colorless , crystalline substance whose composition is 28.2 % K, 25.6 % Cl, and…

A: Given, Element %  of  K = 28.2 % = 28.2 g Element %  of  Cl = 25.6 % = 25.6 g Element %  of  O =…

Q: Explain what the subscript in the formula for a compound indicates. Explain what the coefficient in…

A: Since you have posted multiple short questions, as per our company guidelines we are supposed to…

Q: the mineral gibbsite has the formula al(oh)3. what mass in,in kg, of al is present in 2.9 kg of…

A: Given, mass of gibbsite,  Al(OH)3  = 2.9 kg = 2900 g Thus, moles of gibbsite can be calculated as,…

Q: How many atoms of Mg, O, and H are represented by the notation 3 Mg(OH)2?

A: To find: The number of atoms of Mg, O and H are represented by the notation 3 Mg (OH)2

Q: When 4.673 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 16.05 grams…

A: Given: Mass of compound burned = 4.673 g. Mass of CO2 produced = 16.05 g. Mass of H2O produced =…

Q: A compound of copper was formed when 1.643 g of Cu was heated in oxygen. The mass of the compound…

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: How many molecules are contained in a 325-mg tablet of aspirin (C 9H 8O 4, molar mass 180.2 g/mol)?

A: Aspirin is an antipyretic and anti-inflammatory drug and is widely used as an antiplatelet agent. It…

Q: An empirical formula will not provide the following information 1. lowest whole-number ratio of…

A: Empirical formula : Empirical formula is the lowest or simplest  ratio of the atoms present in the…

Q: An empirical formula can be defined as: A)The exact number of atoms in a compound. B) The formula…

A:

Q: Ethanol, CH3CH2OH, is the principal type of alcohol found in alcoholic beverages, produced by the…

A:

Q: What is the molecular formula of a compound

A: Given :- molar mass of compound  = 220 g/mol            Empirical formula = P2O3.  To find :…

Q: When 4.464 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 14.01 grams…

A:

Q: The empirical formula for a compound is CH2O, and the molar mass is 180.2 g/mol. Which is the…

A: The empirical formula of compound  = CH2O The molar mass of Molecule = 180.2 g/mol   To get the…

Q: Potassium bromate is a colorless , crystalline substance whose composition is 23.4 % K , 47.8 % Br ,…

A: An empirical formula gives the smallest whole number ratio of different elements present in the…

Q: 3. A sample of a compound of CI and O reacts with an excess of H2 to give 0.233 g HCI and 0.403 g…

A: Given datas – Mass of HCl formed = 0.233g Mass of H2O formed = 0.403g We can write the expected…

Q: A compound containing only carbon, hydrogen, and oxygen is subjected to elemental analysis. Upon…

A: Given information: Mass of sample = 0.7916 g Mass of carbon dioxide = 1.581 g Mass of water = 0.6474…

Q: A sample of rubbing alcohol solution contains ethanol, C2H5OH(l). If the sample contains 1.25 × 1023…

A: Given;

Q: How to calculate the theoretical mass percentage of an element in a compound

A: The percentage composition of a compound is the percentage by mass of each element in the compound.

Q: Based on their molecular masses, list the molar mass of each substance: Fe,0, CO Fe co,

A: In this question, the molar mass of the given compounds have to be determined: The molar mass of a…

Q: Which of the following cannot be an empirical formula? O 1) Al(SIO3)3 O 2) AGNO3 3) KCI O 4) C4H10

A: Empirical Formula It is a chemical formula showing simplest ratio of elements in a compound.…

Q: A compound containing only phosphorus and hydrogen was fully combusted and yielded 17.9 g of P4O10…

A: Given statement is : A compound containing only phosphorus and hydrogen was fully combusted and…

Q: When 4.669 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 16.03 grams…

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: A 3.06 mg sample of a compound containing carbon, hydrogen, and oxygen underwent combustion…

A: Empirical formula: Formula containing atoms in smallest possible integer ratio Molecular formula:…

Q: Question attached

A: Mass percentage It is the ratio of mass of an atom to the total mass of the compond. mass…

Q: etraphenylporphyrin is a synthetic compound that resembles naturally occurring porphyrins.…

A: Step 1: % by mass of C = 85.96 % % by mass of H = 4.92 % % by mass of N = 100-(85.96 + 4.92)…

Q: What is the molecular formula of a compound with an empirical formula of CH20 and a molar mass of…

A: Empirical Formula:- It is the simplest positive integer ratio of atoms present in a compound.…

Q: A pure sample of a compound that contains boron and hydrogen weighs 0.469 g. If the sample is found…

A:

Q: A sample of dry solid waste has the following composition : 531 g carbon (C), 133 g hydrogen (H),…

A: The answer is given below

Q: How many moles of glucose can be formed from 2.53 × 1024 H atoms?

A:

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

A:

Q: How many moles of CO2 are contained in 42.0 x 1024 molecules of CO2?

A: Given:Molecules of CO2 = 42.0 x 1024 moleculesWe need to find the moles of CO2 containing the given…

Q: Glucose contains 39.95% C, 6.71% H, and 53.34% O, by mass. If the molar mass of glucose was found…

A: A numerical problem based on determination of molecular formula, which is to be accomplished.

Q: What is the molecular formula of a compound that contains 66% Ca and 34% P and has a molar mass of…

A: The percent of Ca = 66 % The percent of the P = 34 % The molar mass of the compound is = 182.18…

Q: When 4.517 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 13.68 grams…

A:

Q: Approximately how many molecules of H2O are in one spoonful of water, assuming that the spoon holds…

A: Given, a spoon holds about 18 mL of water.we are asked to calculate the number of water molecules in…

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.