This is the chemical formula for talc (the main ingredient in talcum powder): Mg,(Si,0,), (OH), An analytical chemist has determined by measurements that there are 60.8 moles of oxygen in a sample of talc. How many moles of hydrogen are sample?

Q: Analysis of an unknown hydrocarbon (CHy) revealed that the compound was 81.68% C. The subscript for…

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Q: Cra(50,), 313

A: The name of the given compound is Chromium (III) Sulfite Cr2(SO3)3 In order to find the Molar Mass…

Q: Match each of the following with its correct answer A sample of compound containing 0.323g carbon ,…

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Q: Example: A phosphorus oxide contains 43.64% P and 56.36% O and its experimentally determined molar…

A: Given compositions--- % P= 43.64 % % O = 56.36%  Molar mass = 283.89 g mol-1 Empirical and molecular…

Q: How many moles is a 5,822 molecule sample of H2O? Give your answer to 4 sig figs and in scientific…

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Q: Propane (C3H8) is widely used in liquid form as a fuel for barbecue grills and camp stoves. For 77.1…

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Q: The percent copper in an unknown copper compound is 22.00 %. What is the formula weight of the…

A: One mole of a substance is equal to as many entities (atoms , molecules , ions ) as there are number…

Q: What is the percent composition of each element in phosphoric acid?

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Q: How many chlorine atoms are in 27 molecules of chloroform, CHCI,?

A: CHCl3 is a polar organic compound and is used as solvent in various organic reactions. It is made up…

Q: The chemical formula for diethyl ether is: (CH, CH,),0 Calculate the molar mass of diethyl ether.…

A: Chemical formula of diethyl ether: (CH3CH2)2O Molar mass of C = 12.0g/mol Molar mass of O =…

Q: What is the percent mass of oxygen in NO3-

A: The  percent mass of oxygen in NO3- is calculated as,

Q: How many N atoms are present are in a 3.13 ng sample of nitrobenzene, c6h5no2? Answer should be in…

A: Given,mass of nitrobenzene ( C6H5NO2 ) = 3.13 ng

Q: How many grams are in 0.02 moles of beryllium iodide, BeI2? Round to the hudreths place (two decimal…

A: From Number of moles formula :                    number of moles = weight of the substance / gram…

Q: For the formula  K3N  What is the percent Nitrogen in the compound

A: Given, compound K3N Molar mass of K = 39 g/mol Molar mass of N = 14 g/mol

Q: DON'T use Ai for answering this

A: In doing the calculations, here are the steps: Step 1: Convert the mass of ammonium carbonate to…

Q: if 0.5025 miles of Mg have combined with 0.335 miles of O, what is the empirical formula of the…

A: The moles of magnesium and oxygen are 0.5025 and 0.335 respectively. To calculate empirical formula,…

Q: One mole of helium contains less molecules than 1 mole of Argon true or false?

A: Explanation as follows

Q: 4. Oxides of titanium are used as pigments. A compound containing only titanium and oxygen is 66.6%…

A: Given:Compound contains only titanium and oxygen.Percent mass of titanium = 66.6 %.Percent mass of…

Q: The percent copper in an unknown copper compound is 27.40 %. What is the formula weight of the…

A: Given: % of Cu in compound = 27.40 % Mass of Copper (1 mole) = 63.546 amu

Q: How many grams are in 3.50 moles of Li? How many moles are in 4.65 x 1024 molecules of NO,? What is…

A: Mole is used to determine the amount of substance. One mole of a substance contains 6.022×1023…

Q: A sample of an oxide of copper was found to have 0.300 mole of copper and 0.150 mole of O. What is…

A: The question is based on mole concept and stoichiometry.Based on  moles provided, we have to…

Q: What is the missing reactant in this organic reaction? R + H₂O H* A O O CH3 -CH₂-OH + HO–C—CH, CH3…

A: When an ester is hydrolyzed in the presence of acid catalyst, the ester group( COOR) is hydrolyzed…

Q: Calculate the percent Selenium in Iridium(III) selenate, from the previous formula.

A: A compound consists of different elements. These elements are present in definite proportion.  The…

Q: Measurements show that unknown compound X has the following composition: element mass % carbon 42.8%…

A: Given,mass of carbon = 42.8 % = 42.8 g => moles of carbon = mass of carbon / molar mass of carbon…

Q: How many total atoms are there in 0.550 mol of hydrazine (N, H, )?

A: Given :- number of moles of N2H2 = 0.550 mol  To calculate :- total number of atoms

Q: Calculate the number of moles of Cl atoms in 1.20×1024 formula units of magnesium chloride, MgCl₂.…

A: Number of formula units of MgCl2 = 1.20 x 1023   Number of moles of H2S = 4.00 moles

Q: 1 Compound X has a molar mass of 135.12 g•mol 'and the following composition: element mass % carbon…

A: Molar mass or  molecular mass :-       It is the sum of atomic masses of the elements present in…

Q: How many molecules are there in 50.3 g of water?

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Q: How many molecules are in a sample of pure benzocaine, if a sample weighs 550mg?

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Q: Determine the quantity of asked for particles for the given moles each substance. Show or explain…

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Q: empirical formula?

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Q: Regular treatment with low dose aspirin is used to help prevent cardiovascular disease. How many…

A: The molecular formula of aspirin is C₉H₈O₄. The number of molecules present in 240 mg of aspirin has…

Q: QUESTION 11 A molecular compound has the formula C11H1601 How many grams of this compound would you…

A: Given- Molecular formula-C11H16O1 Molar mass =164 gm

Q: How many aluminum atoms are in 841.555 g of Al203 ? Answer in units of atoms.

A: Mass of aluminum oxide is 841.555 g. Molar mass of aluminum oxide is 101.96 g/mol.

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.