A sample of a compund made entirely from copper and oxygen was founf to have a total mass of 0.1431g. The mass of the copper om the compound eas found to be 0.1271g.Calculate the number of moles of copper in the sample.

Q: There are two oxides of copper. One oxide has 20%oxygen, by mass. The second oxide has a smaller…

A: The copper metal possesses two oxidation sates that are +1 and +2. The two ions of copper are Cu+…

Q: ay moles o

A:

Q: An automobile gasoline tank holds 42 kg of gasoline. Whenthe gasoline burns, 168 kg of oxygen are…

A: Given information: Mass of gasoline = 42 kg Mass of oxygen = 168 kg

Q: (a) Does the percent by mass of each element in a compounddepend on the amount of compound? Explain.…

A: a) In a molecule of calcium chloride, there is one calcium atom and two atoms of chlorine. The total…

Q: Please expalin in steps with any fake data you want to help explain to me on how to solve - the…

A: Experimentally oxalate ion can be determined by the titrimetric method with the use of KMnO4 as…

Q: A chromium-containing compound has the formula Fe,Cr,O, and is 28.59% oxygen by mass. Findx and y.

A:

Q: Which of the following statements BEST describes a mole? O It is equal to the number of molecules O…

A: 1 mole contains 6 X 10 23 no of molecules. Therefore it is equal to the Avogadro's number of…

Q: 5.00 g of copper is reacted with 5.00 g of sulfur in a crucible and acompound composed of copper and…

A: The question is based on the concepts of reaction  Stoichiometry. we know the amount of product…

Q: A chromium containing compound has a formula FexCryO4 and is 28.59% oxygen by mass  Find x and y

A: Given, mass percentage of O in FexCryO4 = 28.59%Molar mass of 4 O in FexCryO4 = 4 × 16 g/mol = 64…

Q: 02% hydrogen. What is the empirical formula of this co mical notation is case sensitive ur chemical…

A: Assume total mass is = 100 g Element  mass(g) Mole= Mass/Atomic mass  Simplest mole ratio C…

Q: les of an element. What amount of gallium, in moles, does 8.34 g Ga represent? moles

A: Given , Weight of Ga = 8.34 g  We need to find moles of Ga  We know that molecular weight of Ga is…

Q: Given the following data: Substance A B Molar mass, g/mol 14 40 Density, g/ml 0.534 1.55 Assume a…

A:

Q: Wwhat is themassin grams of one mole of sulfur? (round to 3 sig figs)

A: The question is based on mole concept. we have to write mass of 1 mole of sulphur atoms.

Q: How many particlcs arc there in 1.43 grams of a molccular compound with a molar mass of 233 g/mol?

A: Given data contains, Mass of molecular compound is 1.43 grams. Molar mass of the compound is 233…

Q: llow mass present before same as the total ma al reaction, mass is

A: Lqws in chemistry are based on evidences but theories in chemistry describe nature of the…

Q: atter.) 115 g of methane is reacted with an equal mass of sulfur.

A: In balanced chemical reaction number of atoms of each element in product side is equal to number of…

Q: A sample of acompound is decomposed in thelaboratory and produces 165 g ofcarbon, 27.8 g of…

A: The given data contains, Carbon = 165 g. Hydrogen = 27.8 g. Oxygen = 220.2 g.

Q: What is the average mass of the tin in the sample?

A: It is a given a mass spectrum of tin which has 3 peaks at 116 with 27% abundance and 118 with 58%…

Q: how many grams of Sn are there in a sample of Sn that contains the same number of moles as 57.9 gram…

A: moles = given mass ÷ molar mass  Mole of He = 57.9 ÷ 4 = 14.47

Q: What is the mass of 1 mole of viruses? How manj ymoles of viruses have a mass equal to the mass of…

A: Given: mass of virus is 9.0×10-12 mg mass of oil tanker is 3.0×107 kg To find: 1. Mass of 1 mole…

Q: chemist determines by measurements that 0.0600 moles of oxygen gas participate in a chemical…

A: Number of moles of oxygen gas = 0.0600 moles

Q: A 1.45-g sample of phosphorus burns in air and forms 2.57 g of a phosphorus oxide. Calculate the…

A: Empirical formula represents the simplest whole number ratio of elements present in a compound while…

Q: Hydrogen gas, oxygen gas, and water vapor are collected in eudiometer. The eudiometer contains…

A: a) Moles of H2(9) =0.00206 g2 gmol=0.00103 molb) Moles of O2(9) =0.0811 g32 gmol= 0.00253 molc)…

Q: A 1.628-g sample of a hydrate of magnesium iodide isheated until its mass is reduced to 1.072 g and…

A: Given data mass of sample  = 1.628  g mass of sample after heating = 1.072 g…

Q: COM POUND USED LUNAK LAN DER, IT 60.109/mol- EX CESS OXYGEN A. COMBUSTI BLE IN THE APOLLO HAS A…

A: Note: Mass of Nitrogen is not given , so we can not calculate the exact composition of nitrogen but…

Q: How many atoms of sulfur are there in 0.0120mol of S, molecules?

A: 1 mol = 6.22 × 1023 atoms  1 mol S8 = 8 mol S atoms

Q: One molecule of H2SO4 would have a mass in grams equal to?

A: Given, one molecule of H2SO4we are asked to calculate the mass of one molecule of H2SO4 in grams.

Q: The molar mass is the mass of a mole of atoms. O True O False

A: Correct Ans is -  The molar mass is the mass of  a moles of atoms ---> This statement is true.…

Q: A 7.591-g gaseous mixture contains methane (CHa) and butane (C4H10). Complete combustion to form…

A: Given : Mass of mixture = 7.591 g Moles of oxygen required = 0.8970 mol The combustion reaction for…

Q: Fluorite, a mineral of calcium, is a compound of the metalwith fluorine. Analysis shows that a…

A:

Q: Nyg) + 3Hz(g) → 2NH,g) How many grams of Ng are necessary to produce 7.77 g of NH,?

A: The number of moles of the substance is equal to the ratio of mass to the molar of the substance.…

Q: the amount of disolved oxygen in Sample of mol L what is this in units of milligrans niver water is…

A: To express the given concentration of dissolved oxygen in mg/L

Q: Use the moles of carbonate ion, CO,²-, to determine the moles of MgCO, and CaCO, present in the…

A: Part 1 :  a.) As in limestone there are both CaCO3 and MgCO3 . So CO32- will come from both CaCO3…

Q: to

A: Mass of Material Can be calculated by multiplying with one atom weight with a number of atoms.

Q: A sample of a compound containing only magnesium and oxygen is found to have 194g Mg and 256 g of O…

A: The percentage of Magnesium and oxygen are calculated as,

Q: Calculate the mass of 0.5 mole of Oxygen gas

A: Number of moles of a substance is equal to the mass of substance divided by its molar mass. n=mM…

Q: The empirical formula for C6H12 is-

A: Applying concept of empirical formula.

Q: A 78.0-g sample of an unknown compound contains 12.4 g ofhydrogen. What is the percent by mass of…

A: Given: Weight of the compound = 78 g Weight of hydrogen = 12.4 g The calculation of the % by mass is…

Q: ny grams of o inds of ontor

A:

Q: The molar mass is the mass of one mole of matter. O True O False

A: We have to explain about the molar mass.

Q: If 13.9 grams of Cu are produced, how manygrams of znSoy willalso be produced?

A: Solving first question in accordance with guidelines.

Q: he information below Ws some volumes of

A: Hydration means the substance combines with water.  Cement undergoes hydration  and forms hardened…

Q: The oxygen gas (O2) in a cylinder has a mass of 360 grams. How many moles of oxygen are present in…

A: The number of moles of solute is defined by the ratio of the mass to the molar mass.

Q: What does xH,0'represent in the formula AL(S0,);•xH,O? The student heats 12.606g of AL(SOxH,O…

A:

Q: What other quantity of matter did Avogadro use to define the mole? O volume O temperature mass O…

A: We know no of moles=mass taken/molecular weight

Q: 3. See the example in Introduction for set-up of calculations. Calculate the number of a) moles of F…

A: Number of moles of F and atoms of F in 32.5g of F2 calculated as follows

Q: Calculate the mass in 20.0 moles of He.

A: The unit used to measure the amount of the substance is the mole. Given: Moles of He = 20.0

Q: Calculate the mass percentage of oxygen in the organic molecule whose line structure is shown below.…

A: The formula of the above mentioned organic molecule is : C18H34O2

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.