3.122 The natural abundances of the two stable isotopes ofhydrogen (hydrogen and deuterium) are 99.99 percent 11H and 0.01 percent 12H. Assume that water exists as eitherH2O or D2O. Calculate the number of D2O molecules inexactly 400 mL of water (density 1.00 g/mL).

Q: Which contains the greatest mass of oxygen: 0.75 mol of ethanol (C2H5OH), 0.60 mol of formic acid…

A: Stoichiometry involves the calculation of concentration of solutions in the given conditions of…

Q: How many atoms or ions of each element are in 157.3 g of the following substances? (a) H₂ x 1025 H…

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Q: • Two new elements with symbols Z and A combine. Ź forms Z¹+ and A forms A3- and the ions combine to…

A: Chemical formula of an ionic compound can be formed by criss-crossing the valencies of ions.

Q: 3 FeS2   +  11 O2   →  Fe3O4   +  6 SO3 100 g of iron sulfide was reacted with excess oxygen,…

A: 3 FeS2   +  11 O2   →  Fe3O4   +  6 SO3 Atomic masses Fe=56; S=32, O=16 Molecular mass of…

Q: Two chemists determined the weight of X obtainable from several samples of an organic compound,…

A: Given:  Mass of X(C6H5)3 = 5.341 gm  Mass of X2O3 = = 2.829 gm

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Q: A 2.4839 g sample of a hydrate of Cu(NO3)2 was heated to drive off all of the water of hydration.…

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Q: 0.93 g sample of NaCr(SO4)2.XH20 was heated in a crucible to get a constant mass. If the mass of the…

A: Molar mass of NaCr(SO4)2.xH2O = 0.93 g = AMass of NaCr(SO4)2= 0.70g = BMolar mass ofNaCr(SO4)2 =…

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Q: An Organic compound contains 59.00% by mass C, 7.15% by mass H, 7.65% by mass N, and 26.20% by mass…

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Q: Given the following reaction,  I2O5(g) + CO(g) --> CO2 (g) + I2(g)  a) If 50 g of iodine(V) oxide…

A: An equation representing the reaction between I2O5 and CO that yields I2 and CO2, for which three…

Q: Phosphorus burns in air to produce a phosphorus oxide (P4O10) in the following reaction. If 0.489…

A: Moles of P = 0.489 mol Molar mass of O2 = 32 g/mol

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A: Given : volume of gas tank = 207 L  Molecular formula for gasoline = C8H18 Density = 762 g /L  To…

Q: Consider the following reaction of K2S2O3 for neutralizing chlorine in industrial bleaching. K2S2O3…

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Q: Determine the mass percentage of carbon, C, hydrogen, H, and oxygen, O, in C8H₁6O₂. Refer to the…

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Q: The formula for dinitrogen monoxide is N2O. If a sample of the oxide was found to contain 0.0800 g…

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Q: A compound containing chromium, Cr; chlorine, Cl; and oxygen, O, is analyzed and found to be 33.6%…

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Q: The percent compositionn compound is 76.0% C, 12.8% H, and 11.2% O. The molar mass of this compound…

A: Answer = The correct option is(d)  C18H36O2 Solution - According to the question - Given - Ratio of…

Q: When 6.313 g of one of the hydrates of sodium sulfate (Na2SO4) was heated to drive off its water of…

A: Mass of hydrate sodium sulphate = 6.313 g  Mass of anhydrous sodium sulfate = 5.036 g

Q: One dose of an antacid contains 860. mg each of Mg(OH)2 and Al(OH)3. How many moles of each…

A: Given:- One dose of an antacid contains 860. mg each of Mg(OH)2 and.     Al(OH)3. To find:- How many…

Q: 4. YOU HAVE 15 GRAMS OF NazSO4. CALCULATE THE NUMBER OF CATIONS IN THIS MASS. GIVEN: MOLAR MASS (…

A: Given compound Na2SO4 and this compound dissociates into cation and anion as  Na2SO4 ⇌2Na+ + SO4-2…

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Q: Mn. S,O. n H20 is the general formula of a certain hydrate. When 234.9 g of the compound of the…

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Q: n element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with mass…

A: Given that, Element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with…

Q: How many moles of oxygen atoms are there in (7.11x10^2) grams of P4O6 (MM = 219.88 g/mol)?

A: Given information: (7.11 x 102) grams of P4O6 (MM = 219.88 g/mol) The mole is calculated as…

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Q: How many H atoms are there in (3.80x10^2) grams of H2O?

A: Number of moles = Mass/Molar mass Number of atoms in 1 mole = 6.0224 x 1023 Molar mass of water =…

Q: An element consists of 0.19% of an isotope with mass 135.907 amu, 0.25% of an isotope with mass…

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Q: How many molecules are there in 1,975.0 g of table sugar, sucrose, C12H22011?

A: Given,  1975 g of table sugar, C12H22O11

Q: 1. Sphalerite is a zinc sulfide (ZnS) mineral and an important commercial source of zinc metal. The…

A: (1) Given that , mass of zinc sulfide = 5.00×103 g = 5000 g    Now, from following Reaction -  2ZnS…

Q: A.)If 4.76  mL of seawater contains about 5.46×10-14  moles of gold, how many atoms of gold are in…

A: Given, A.)If 4.76  mL of seawater contains about 5.46×10-14  moles of gold, number atoms of gold are…

Q: aspartame has molecular formula of C14H18N2Oc5(s). what is the molar mass? what is the amount of…

A: The molar mass of any molecule is the total sum of the molar masses of all the atoms present in that…

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Q: A sample of aluminum contains 2.91 x 1022 atoms of aluminum. What is the mass of this sample?…

A: Number of aluminum atoms = 2.91 x 1022 atomsmass of sample of aluminum = ?Note: Avogadro’s number:…

Q: Find the mass of 2.54 X 1023 molecules of Ca(OH)2? Use: Ca = 42.0g, H = 1.15g and O = 15.8g as…

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Q: A 2.1880 g sample of a hydrate of Cu(NO3)2 was heated to drive off all of the water of hydration.…

A: The objective of this question is to determine the value of 'x' in the formula of the hydrate…

Q: 1) The hydrated salt Al(NO3)3 nH20 is 7.194% by mass of aluminum. Calculate the value of n.

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Q: 74. A throat lozenge contains 5.0 mg of menthol, which has the formula C10H20O. How many moles of…

A: Given : 74. 1. How many moles of menthol are in 5.0 mg of menthol? 2.What is the mass in grams of…

Q: How many moles of HCl are in 30.6 g HCl? Express your answer in millimoles. (atomic weights: H=1.01;…

A: • Thus, 839 millimoles of HCl are in 30.6 g HCl in correct number of significant figures.

Q: What is the mass of 3.45 moles of aluminum sulfate [Al2(SO4)3]?

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

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Q: Write the empirical formula for at least four ionic compounds that could be formed from the…

A: Write the empirical formula for at least four ionic compounds that could be formed from the…

Q: A compound contains only carbon, hydrogen, and oxygen. Combustion of 10.68 mg of the compound yields…

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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.