100 91.75 80 60 40 20 5.85 2.12 0.28 54 56 57 58 Mass number Relative number of atoms

Q: Relative number of atoms The stable isotopes of iron are 54F., 56FE, 57Fe, and 58F.. The mass…

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Q: Given the isotopes listed below, which of them are useful and which ones are not? Why are they…

A: Given: A list of isotopes of different elements: To Find: The isotopes which are stable in the given…

Q: The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of…

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Q: hydrogen phosphide can be decomposed to give phosphorus and hydrogen in a mass ratio of 10.32:1.00.…

A: the molecular formula of this substance is PH3 and the name of this compound will be phosphine.

Q: A chemical compound containing hypothetical elements Av, Bw, Cx, Dy, Ez has mass percentages of…

A: Given: Atomic mass of Av = 18.25 g/mol. Atomic mass of Bw = 4.32 g/mol. Atomic mass of Cx = 26.82…

Q: What is the mass percentage of phosphorus in a sample of 8.53 phosphorus oxychloride containing a…

A: Mass percentage of phosphorus = 20.16 %

Q: When 0.220 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: Given : Mass of iron=0.220 g Atomic weight of iron=55.85 g/mol Atomic weight of oxygen=16 g/mol Mass…

Q: Suppose that atomic masses were based on the assignment of a mass of 12.000 g to 1 mol of carbon,…

A: SOLUTION: Step 1: One Dalton is defined as one-twelfth the mass of one mole of carbon-12 isotopes.…

Q: The reaction of sulfur powder (S8) with oxygen gas (O2) results in the formation of one of many new…

A: We know that, molar mass of O = 15.999 g/mol molae mass of S = 32.065 g/mol

Q: Determine the molecular formula if the molar mass of the compound is 957.86 g/mol.

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Q: A chemical compound containing hypothetical elements Av, Bw, Cx, Dy, Ez has mass percentages of…

A:

Q: The mass spectrum of an organic compound shows the relative abundances of M to be 87.83% and M+ 1 to…

A: Relative abundance/intensity of M+1 peak = 11.40 % Relative abundance/intensity of M peak = 87.83 %…

Q: 1. Sodium is an alkaline metal which is very reactive and so is not found free in nature. Sodium…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: D. Calculate the mass (g) of the following samples. 25) 238 moles of lead 26) 1.54 x 10° moles of Zn…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: A student has a sample of zinc that weighs 22.19 g. How many zinc atoms are in this amount of zinc?…

A: The Number of atom present in one mole of an element is equal to the Avogadro's number (6.022×1023…

Q: A chemical compound containing hypothetical elements Av, Bw, Cx, Dy, Ez has mass percentages of…

A: We need to find molecular formula for given compound.

Q: 19. Nicotine is the component in tobacco that makes smoking addictive. The structure of nicotine is…

A: The nicotine molecule consists of 14 Hydrogen atom (s), 10 Carbon atom (s) and 2 Nitrogen atom (s) -…

Q: Sodium is an alkaline metal which is very reactive and so is not found free in nature. Sodium forms…

A:

Q: The number of subatomic particles represented by : Au*+ 197 O 79 Protons, 118 Neutrons, 79 electrons…

A: Applying formula  A=Z+n

Q: Mass Spectrum for Tin (Sn) 120 100 100 80 58 60 40 20 0. 115 116 117 118 119 120 121 mass (amu)…

A: Welcome to bartleby ! We have to calculate average weight of Sn

Q: A 6.55 g sample of calcium sulfide was decomposed into its constituent elements, producing 3.64 g of…

A: According to the law of constant composition, for any particular chemical compound, all samples of…

Q: 2. The atomic masses of 35Cl (75.53%) and 37Cl (24.47%) are 34.968 amu and 36.956 amu, respectively.…

A: We'll answer the first question since the exact one wasn't specified. Please submit a new question…

Q: Use the data below to determine the mass ratio of iron to oxygen for compound 2. Mass Fe Mass O…

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Q: If the density of indium is 7.31 g/cm', how many atoms are there in a indium piece of 30 dm wide, 5…

A: Density of an element is defined as the ratio of the mass of the element to its volume.…

Q: 15. An oxide of lead contains 90.65% Pb, by weight. The empirical formula is: * Pb02 O Pb304 Pbo Pb…

A: Pb, atomic mass = 207 g/mol Percentage = 90.65 Relative number of moles = 90.65/207 =  0.437 O2,…

Q: When Dalton began his calculations to determine atomic masses he had to make a number of…

A: A compound is a substance that is made of two or more elements. Generally the compound may contain…

Q: How many gold (Au) atoms are there in a 10. g sample of that is 50% Au by mass?  a. 6.2 x 1022 b.…

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Q: Use the conversion factor 1 amu = 1.66054 x 10-24 g to answer the questions. How many atomic mass…

A: Given: 1 amu = 1.66054×10-24 g

Q: Question attached

A: To find: The masses of given species in amu

Q: 30. In calcium carbonate what is the mass percentage of  oxygen atoms?    A. 68%   B. 12%   C.…

A: Calcium atomic mass = 40. Carbon atomic mass =12. Oxygen atomoic mass = 16. Here three oxygens are…

Q: A certain compound X is composed of 70.53% carbon, 13.02% hydrogen, and the remainder is nitrogen.…

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Q: the formula for this batch of Epsom salts?

A: Mass percent of water in Epsom salt = 100 x Mass of water/Mass of Epsom salt Mass of Epsom salt =…

Q: sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample?  [Molar…

A: Given that: Molecules of Al = 2.91×1022 atoms  Molar mass of Al = 26.98 g/mol  1 mol = 6.023×1023…

Q: Using the average atomic masses for each of the following elements, calculate the mass (in amu) of…

A: Average atomic masses of the following species is as follows - Na = 22.9898 amu Li = 6.941 amu Mg =…

Q: Calculate the mass, in kg, of each sample. I.) 1.68×1026 cadmium atoms. II.) 3.57×1027 nickel…

A: Here we need to calculate the mass of each sample as: I.) 1.68×1026 cadmium atoms. II.) 3.57×1027…

Q: Mass spectrometry is more often applied to moleculesthan to atoms. We will see in Chapter 3 that the…

A: When we study the interaction of electromagnetic radiation with matter then this study is known as…

Q: Carbon and oxygen form no fewer than five different binary compounds. The mass percentages of carbon…

A: All five compounds are made up of Carbon and Oxygen. As the percentage mass of Carbon of the five…

Q: the mass (in mg) of 4.82*10^22 atoms of sodium

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Q: The stable isotopes of iron are $4Fe, Fe, $7Fe, and 5"Fe. The mass spectrum of iron looks like the…

A: The given mass spectra of iron is, The relative number of isotope atoms of 54Fe is 5.85. The…

Q: A 1.58 mole sample of a pure unknown substance has a density of 1.87 g/cm3. If the sample occupies a…

A: Given,Density = 1.87 g/cm3Volume = 188 cm3Mole = 1.58 mole

Q: A chemical compound containing hypothetical elements Av, Bw, Cx, Dy, Ez has mass percentages of…

A: We have to determine the Molecular formula of a compound having following hypothetical elements.

Q: Cobalt(II) sulfate heptahydrate has pink-colored crystals. When heated carefully, it produces…

A: The roman number (II) written after Cobalt in the names Cobalt(II) sulfate heptahydrate and…

Q: A sample of TNT, C7H5N3O6 , has 7.97 x 1021 nitrogen atoms. How many hydrogen atoms are there in…

A: The details solution for this is provided below in attach image.

Q: Using the % mass composition of N, calculate the mass of nitrogen present in 9.41 grams of the amino…

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Q: When 0.210 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: Given  Wt. If iron = 0.210 g  Wt. Of iron oxide = 0.341 g  Atomic weight of iron = 55.85 g/mol…

Q: empirical formula and formula mass of the compound

A: Empirical formula is the formula which consists atoms of each element in simple whole number ratio.…

Q: Mass Spectrum for Tin (Sn) 120 100 100 80 58 60 27 40 20 115 116 117 118 119 120 121 mass (amu) 8.…

A:

Q: Ordinary table sugar is primarily sucrose, which has the chemical formula C 12 H 22 O 11. What is…

A: Each substance/molecule gets formed by combining some element's atom with certain proportion. The…

Q: 2. What number of gold atoms are in one mole of gold atoms? A 196.97 ) B 6.022 x 10²3 C 79 ) D 1.66…

A: Given,  The number of gold atoms in one mole of gold atoms is:

Q: Determine the molar mass of the following compound, given the atomic mass of the following atoms: •…

A: The molecular mass of a compound is the sum of the atomic mass of all the constituent atoms present…

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.