1. A mole of hydrogen gas (H₂) is compared with a mole of lead (Pb). You can be certain that the sample of hydrogen and the sample of lead have the same *   a)Mass b)Number of particles c)Volume d)All of the above   2. The number of moles of oxygen atoms in one mole of phosphoric acid, H₃PO₄ , is    a)One b)Four c)Seven d)Three

Q: Which does NOT describe a mole?A. a unit used to count particles directlyB. Avogadro’s number of…

A: Mole is an SI unit used to measure the amount of the substances present. One mole of the substance…

Q: Potassium cyanide reacts with acids to produce hydrogen cyanide gas via the following reaction:…

A:

Q: 5. What quantity is needed to convert between the moles of carbon and the number of carbon atoms in…

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Q: Suppose a student starts with 2.4185 g of a sand mixture and separates the components into 1.3012 g…

A: The mass percentage is the simplest way of representing the mass of the components present in the…

Q: A sample of hydrated aluminum sulfate wing 2.954 g was given to a student to be used in the water of…

A: Assuming the formula of hydrated aluminum sulfate is Al2(SO4)3 . yH2O where y = number of water…

Q: An organic compound consists of carbon, hydrogen and nitrogenonly. Complete combustion of a 150. mg…

A: Answer:- This question is answered by using the simple concept of determination of empirical formula…

Q: What is the percent by mass of hydrogen in sulfuric acid

A: Molar Mass of H = 1 g/mol Molar mass of H2SO4 = 98 g/mol

Q: Explain how you can use the mole number (6.02 x 1023) to count atoms.  Answer in complete sentences.…

A: According to Avogadro's law for mole concept, one mole of any substance contains number of atoms…

Q: 1. Determine the number of moles and the mass (in g) of sodium nitrate, NaN03, required to decompose…

A: Given,

Q: You have 9.99 × 10^25 molecules of water. Find the volume of this in milliliters. Water has a molar…

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Q: A sample that contains only MnCO3 and MgCO3 weighs 0.9536 g. When it is dissolved in excess acid,…

A: Here we are required to find the percentage of MnCO3 in the sample .

Q: d. solid magnesium and diatomic nitrogen gas react to form solid magnesium nitride e. sulfuric acid…

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Q: A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent…

A: A. Given that : The given hydrocarbon is C10H22. We have to calculate the % composition (by mass) of…

Q: To whom it may concern, I was trying to complete some problems with mole conversions from the book…

A: b) Mass of N atoms in a sampleLet us consider Mass of Mg (NO3)2 is 43.5 g in sample.Molar mass of Mg…

Q: Calculate the number of moles in the sample and iron atoms in the sample.

A: Given :- mass of iron = 15.7 g  To calculate :-  moles of iron  number of atoms of iron  number of…

Q: C4H10 and C6H12 are both hydrocarbons. Whic one contains higher mass percentage of carbon?

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Q: Consider samples of phosphine (PH3), water (H2O), hydrogen sulfide (H2S), and hydrogen fluoride…

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Q: Br A) What is the molecular formula for this compound? B) What is the empirical formula for this…

A: A Molecular formula  represent the total number of atoms of each element in each molecule of a…

Q: A white-colored solid contains 75.26% Ag by mass, and the rest is chlorine. Enter the empirical…

A:

Q: A compound is 22.76% Carbon, 68.30% Boron and 8.93% Hydrogen by mass. What is this compound’s…

A: The given percentage of different elements firstly changed into moles by deviding it by atomic…

Q: An oxide of iron is 77.73% iron by mass; the rest is oxygen. Enter the empirical formula of this…

A: Given :-  Percent composition of Fe = 77.73 %  Percent composition of O = (100-77.73)%…

Q: The number of hydrogen atoms in a mole is Avogadro’s number, 6.02 * 1023. If one mole of the gas has…

A: This problem can be solved by knowing that one mole of substance consists of 6.022×1023 atoms.

Q: 29) How many moles of iron(II) sulfate are contained in 4.657 g FeSO, ? B) 0.03066 A) 1.245 C)…

A:

Q: How many moles are in 7.5 x 1019 molecules of ammonia, NH3?

A: Since we know that  1 mole of any substance = 6.022×1023 molecules Here,        6.022×1023 is the…

Q: 2. The air in a flask is to be replaced with He gas in a way similar to how air is replaced in the…

A: Air is homogeneous mixture of many gases. The major component of air is nitrogen gas(78%). The molar…

Q: What advantage is there to using a counting unit (the mole) inchemistry rather than a mass unit?

A: Using counting unit as mole in chemistry is advantageous as with help of this we can inter convert…

Q: finding the number of moles of Zn(OH), produced i

A: To find the correct set up we need to correlate  Zn and Zn(OH)2 in terms of moles

Q: When one formula unit of iron (III) sulfide decomposes into elemental iron atoms and sulfur atoms,…

A: The formula of iron(III) sulfide is: Fe2S3   The decomposition  reaction is: Fe2S3   → 2 Fe  + 3 S

Q: Glycine is an amino acid with the formula C, H,NO,. Determine the number of moles of carbon in 49.24…

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Q: How many moles of each element are in this sample? Enter the number of moles of carbon followed by…

A: we are given  moles of C = 6.66 moles of H = 19.8 we are to find the empirical formula for given mol…

Q: Mass of Container + Sample 2.70 Mass of Container 1.95 48.00 % of Sand % of Ammonium Chloride 16.00…

A: Given: (1) Mass of container + sample = 2.70 g (2) Mass of container = 1.95 g   (3) % sand = 48.00…

Q: A compound contains carbon, hydrogen, and nitrogen as its only elements. A 9.353 g sample of the…

A: Given that the mass of C and H in a compound of mass 9.353 g is 5.217 g and 1.095 g respectively.

Q: minutes

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Q: 4. 4.00 moles of sulfur dioxide SO2? 2.50 moles of methane CH,? How many moles are there in: 6.…

A: Each mole of any substance has Avogadro number of molecules. Each moles of any substance has…

Q: Question 40

A: The given molecules are, CaSO4, Al2(SO4)3 and K2SO4

Q: 5 g of hydrated barium chloride is heated in a crucible until the mass of the sample no longer…

A: Given: Mass of hydrated barium chloride = 5 g Mass of sample after heating = 4.26 g The loss of mass…

Q: 26. a. A mole of bromine atoms contains atoms b. A mole of bromine molecules contains c. A mole of…

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Q: the empirical formula of a compound

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Q: Define the term "mole." What is the unit for mole in calculations? What does the mole have in common…

A: Using concept  and explanation of mole . Mole = grame weight/ molecular weight or atomic weight

Q: 24. How many moles are there in 2.0 x 10^(22) molecules 02? O 0.063 moles O 0.053 moles O 0.043…

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Q: 18. 7.68 g/mol ® ng/molecules

A: The conversion of quantity from one unit to another unit is known as unit conversion. During the…

Q: c38(g)+5o2(g)=3co2(g)+4h2o(g) how many moles of carbon dioxide would be produced from 20.45 moles of…

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Q: A sample of monoprotic acid was analyzed. The sample contained 40.0% C and 6.71% H. The remainder of…

A: The simplest positive integer ratio of atoms in compounds is the empirical formula of a chemical…

Q: One of the main chemical components of chocolate is made up of the following: 46.67% C, 4.48% H,…

A: Given data, Carbon = 46.67% = 46.67 g Hydrogen = 4.48% = 4.48 g Oxygen = 17.76% = 17.76 g Nitrogen =…

Q: 9) How many molecules of SO, are in 200 g of SO,?

A:

Q: Mass of Sample Moles of Sample Molecules in Sample Total Atoms in Sample 4.59 g C6 H6 g 0.228 mol H2…

A: One mole of any substance contains Avogadro's number of particles such as atoms, molecules. The…

Q: A large organic molecule has a mass of 1.41 * 10-21 kg. What is the molar mass of this compound?

A: Given that, Mass of organic molecule= 1.41×10-21 kg Molar mass is given by the following formula…

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.