Percent Composition by Mass: = 3.907 g of carbon combines completely with O.874 g of hydrogen to orm a compound, what is the percent composition of this compound?

Q: Determine the molar mass of a substance if 0.310 moles has a mass of 152 g.

A: Given :- number of moles of substance = 0.310 mol  Mass of substance = 152 g  To calculate :-  Molar…

Q: What is a mole of a substance? O alaboratory spoon full of a substance O The amount of a substance…

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Q: A compound has the following in weight: - 40% carbon - 6.7% hydrogen - 53% oxygen. The molar mass is…

A: Given, mass % of C = 40 % = 40 g mass % of H = 6.7 % = 6.7 g mass % of O = 53 % = 53 g molar mass of…

Q: Sarah is carrying out a lab using 1.550g of sodium bicarbonate. She calculates the theoretical yield…

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Q: A 2.45g sample of strontium completley reacts with oxygen to from 2.89g of strontium oxide. What is…

A: Mass of Sr = 2.45 g  Mass of Strontium oxide = 2.89 g  Mass % =?

Q: How many moles of Al(CN), are in 223 g of the compound? mol 223 g Al(CN),

A: Given the mass of the compound, Al(CN)3 = 223 g In order to find the moles of Al(CN)3, we have to…

Q: How many formula units in 0.00156 moles of calcium hydroxide?

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Q: .370 mol of octane is allowed to react with .780 mol of oxygen . After the reaction how many moles…

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Q: Calculate each of the following quantities in 0.150 molmol of C6H14OC6H14O.

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Q: If my actual aspirin yield was 0.250 mol and the theoretical mass was said to be 54.048g what would…

A: Theoretical mass of Aspirin= 54.048g  Actual yield = 0.250mol  Molar mass of Aspirin= 180.16g/mol…

Q: How many molecules C,H, are in 7.62 mol?

A: given  No of moles.   7.62 mol

Q: 2) How many formula units are in 5.00 moles of CaSO,?

A: Solution:       Formula mass involves an addition of the masses of atoms present in the empirical…

Q: How many total atoms are in 0.910 g of P,0,? total atoms:

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Q: Calculate the percent composition by mass of each element in LiClO,. % % Li = % Cl = %O =

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Q: What is the mass percent of of 0.389g of silicon that reacts with oxygen to form 0.832g silicon…

A: Percent by mass ( w/w)% = (mass of Si/mass of SiO2) × 100 %

Q: 34.0 g of aluminum and 39.0 g of chlorine gas, How much would be the excess reactant?

A: The molar mass of aluminium (Al) is 26.98 g/mol. The molar mass of chlorine gas (Cl2) is 70.9 g/mol.

Q: How many molecules are in 22.4moles of CCI,?

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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: Aluminum chloride is formed by reacting 15.32 g aluminum with 60.66 g chlorine. What is the percent…

A: Given: Mass of aluminium in the compound = 15.32 g. And mass of chlorine in the compound = 60.66 g.…

Q: How many moles of tin atoms are in a pure tin cup with a mass of 43.8 g ? v= ? mol

A: Mole concept:  According to Avogadro concept, the number of atoms in one mole of the substance is…

Q: If .01682 mol of Iodine reacted, how many moles of iodide ions I- reacted? Given .01667 mol of zinc…

A: The number of moles of iodine is 0.01682 mol. The number of moles of zinc is 0.01667 mol.

Q: How many grams of Br are in 145 g CaBr, ? mass:

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Q: 5. How many moles are in 77.56 g of CaCO3?

A: Given mass (m) = 77.56 g  We have CaCO3 as the compound here and need to find the no. of moles.…

Q: Complete the dimensional analysis to show how you would convert grams of WATER to molecules of…

A: Given  Mass of water = 100 gram  Molar  mass of water =  18.02 gram/mole  Avogadro's number   =…

Q: Dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen gas. What mass of nitrogen dioxide…

A: Given , mass of N2O5 = 37.4 g Molar mass of N2O5 =108.01 g/mol M.M of NO2= 46 g/mol

Q: mass of salicylic acid: 2.25g,  volume of acetic anhydride: 4.03mL, the mass of filter paper and…

A: The chemical reaction taking place in the formation of Asprin is given as below -

Q: 2. The rubbing alcohol was found to have 60% carbon, 13.4 % hydrogen, and the remaining percent by…

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Q: Convert 691.3 molecules of methane into moles. Your answer should have 4 sig. figs.   I know the…

A: The number of molecules in one mole of compound is equal to the Avogadro’s number.

Q: An alloy of aluminum and magnesium contains 0.0890 mol of Al and 0.0381 mol of Mg.  What is the…

A: Calculate the mass of Al and Mg in the alloy sample. WAl = nAl × MAlWAl = 0.0890 mol × 27 g(mol)-1…

Q: What is the percent composition of carbon in carbon dioxide?

A: Required percent composition of carbon in carbon dioxide.

Q: After a hydrate of sodium carbonate weighing 1.000 g is heated in a crucible for 15 minutes to drive…

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Q: Stoichiometric calculations mean: .A Gram atomic weight .B Gram formula weight .C Gram molecular…

A: Given in following question stoichiometric calculation means a.)gram atomic weight b)gram formula…

Q: QUESTION 12 Which is not a hydrate of a proton? 430,,+ O H4908 O H3o* O H,708" H3O+

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Q: If 5.24 g of potassium chlorate is heated, what theoretical mass of oxygen gas should be produced?…

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Q: Combustion of 10.68 mg of the compound yields 15.92 mg CO2 in 4.89 mg each to the molar mass of the…

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Q: 4. How many grams are there in 60.0 X 102 formula units of Mg, (PO),? Molar Mass: Mg: P: O: Total:

A: Molar mass of a particular compound is the sum of atomic masses of constituent elements. Moles of…

Q: In 3.47x1026 molecules of of C3H7NO2 a.How many moles of C3H7NO2 are present b.How many moles of…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: the percent composition of a compound was determined to be 70% carbon, 6% hydrogen and 24% notrogen.…

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Q: ny atoms a

A: The number of moles is determined as the mass of the substance upon its molar mass. The number of…

Q: If 60.2 grams of Hg combines completely with 24 grams of Br to form a compound, what is the %…

A: Given: Mass of mercury (Hg)=60.2 g Mass of Bromine (Br)=24 g The total mass of compound =(60.2 +24)…

Q: What is the percent oxygen in barium phosphate?

A: The first step is to identify the chemical formula of barium phosphate. The chemical formula of…

Q: How many molecules of CH, are in these 5.00g? How many moles of Cl, are in 15.0 g of Cl,? How many…

A: Given, chemical reaction takes place between methane and chlorine. The balanced chemical equation of…

Q: 0.474g of nitrogen were reacted with oxygen, the resulting mass was 0.745g. What is the empirical…

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Q: How many total atoms are there in 19.9g of ammonia (NH, )? atoms total atoms: How many moles of N…

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Q: Given the reaction has a percent yield of 88.8%, what is the mass in grams of aluminum iodide that…

A: Interpretation-  To determine the mass in grams of aluminum iodide that would be required to yield…

Q: The molar mass unit is gram per mole

A: Molar mass: It the mass of chemical substance that is present in one mole amount of substance.

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.