Circle the best correct answer for the following multiple choice questions: 1) How many aluminum atoms are there in 3.50 grams of Al½O3? (а) 2.45 х 1022 (b) 2.07 x 1022 (с) 1.68 х 1022 (d) 4.90 х 1022 (e) 4.13 x 1022 2) What mass of cerussite, PbCO3, would contain 35.0 grams of lead? (a) 51.7 g (b) 42.4 g (c) 35.6 g (d) 45.1 g (e) 27.1 g

Q: A mass of 145 g of a certain element is known to contain approximately 3.64 x1024 atoms. What is the…

A: Let the molecular weight of the element is M gm/mol.  Moles = weight/mol. wt.  Or, moles = 145/M  We…

Q: There are three isotopes of an element, X-28, X-29, and X-30, with relative abundances of 92.2297%,…

A: Given  molar mass of X1 = 28 with abundance 92.2297% molar mass of X2 = 29 with abundance 4.6832%…

Q: What is the average mass, in grams, of one Zna Multiple Choice O 1661 x 10 24 O 65.39 amu O 65.39 g…

A: Molar mass of Zn = 65.38 g/mol

Q: How much would 2.4 x 1024 molecules of N2O5 weigh?

A: Given- number of Molecules =2.4 ×10^24 molecules

Q: In which of these compounds are there twice as many Oxygen atoms as Hydrogen atoms?

A: To find :- The compound having oxygen atoms two times more than the hydrogen atoms.   We can easily…

Q: How many Atoms are there in C6H12O6 ?

A: Atoms are the basic building blocks of all matter. They can combine to form molecules, whose…

Q: 2. If you have 1.00 grams of N22CO3, how many moles of Na2CO3 is that?

A: Given, mass of Na2 CO3 = 1.0 g Moles of Na2CO3  = ?  Firstly, find Molecular mass of Na2CO3

Q: What if you discovered Avogadro’s number was not 6.02 3 1023 but 3.01 3 1023? Would this affect the…

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Q: Cesium has 39 known isotopes ranging from mass 112 to 151. If a sample of cesium containing only…

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Q: 2. In a chemical atomic mass determination, the tin content of 3.7692 g of SnCl4 was found to be…

A: In SnCl4 one Sn atom combine with 4 chlorine atom. Given mass of SnCl4 is 3.7692 g and mass of Sn is…

Q: 3. How many hydrogen atoms are on the left side of the arrow, and how many hydrogen atoms are on the…

A: The given reaction is- 2H2 + O2→2H2O

Q: 6. Explain what the coefficient of 4 means in the following chemical formula: 4K,SO,

A: Given that, 4K2SO4

Q: Compute the númber of ions present in 5.85 g of sodium chloride. (Given, NA = 6.022 x 102, atomic…

A:

Q: What is the mass of a single fluorine molecule, F2?

A: The mass of a molecule is the mass of all the atoms present in the molecule in grams. In order to…

Q: The molar mass of nicotine C10H14NX is 162 g/mol. What is the value of x?

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Q: This question will walk you through the process of calculating the number of atoms present in a…

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Q: Jsing the general formula for a 1.60), calculate the following: a. The number of hydrogen atoms E b.…

A: By using general formula of cyclo alkane to answer the following questions--

Q: How many atoms are in 28.0 grams of magnesium?

A:

Q: 9. If a cabin et is made of 5.65 grams of Gold, how many atoms of gold are in the cabinet?

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Q: How many grams does 3.5 × 10²⁵ molecules of H2SO4 weigh?

A:

Q: 3.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: The empirical formula is the chemical formula of any compound that represents the proportions of…

Q: What are the mass percent of elements in glucose, C6H1206?

A:

Q: How many grams of potassium permanganate contain 5.48 x 1020 atoms of oxygen?

A: Given: Number of atoms of oxygen in KMnO4 sample = 5.48 × 1020 atoms.

Q: How many grams of K2C2O4, potassium oxalate, would containe 182 grams of pure potassium?

A: The molar mass of potassium oxalate can be calculated as:

Q: How many moles of mercury are there in 176.1 grams of mercury? 0.75 Question 4 What would 6.2E23…

A: Mole is the unit that is used to represent the amount of substance. One mole has 6.022 × 1023 number…

Q: 11. How many oxygen atoms are there in one formula unit of Ca2*?

A: 1. Formula unit is used to indicate lowest reduced ratio of ions in the compound  2. Molarity :…

Q: What is the mass to charge ratio of a propane ion (C3H3*) if one of the carbon atoms is a 13C and…

A: The mass to charge ratio of the propane ion (C3H8+) can be calculated by taking the sum of the mass…

Q: 1.75 x 1025 selenium atoms contains ____ moles of selenium. Report your answer to 3 s.f. (hint: this…

A:

Q: b. U.00004042 fng 4.042 x 10-5 mg Which sample of element is heavier? Show appropriate calculations…

A: Given: The moles of N2 = 2 moles. The moles of Fe = 1 mol. The moles of F2  = 1.5 moles.

Q: If there are 8.59 x 1022 molecules of NaCl in a salt shaker, what is the mass of NaCl?

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Q: Oxygen 15.9994

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Q: What is the % mass of oxygen in citric acid, C6H807?

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Q: Calculate the number of atoms of hydrogen (H) in 323 cm3 of the colorless gas ethylene at 0 °C and…

A: 1 mole of C2H4 (ethylene) has 2 moles of carbon and 4 moles of hydrogen in it.1 mole of any…

Q: 27. When iron(III) oxide reacts with hydrochloric acid, iron(III) chloride and water are formed.…

A: Balanced chemical equation:  Fe2O3  + 6 HCl ---> 2 FeCl3 + 3 H2O  Mass of Fe2O3 = 10.0 g Mass of…

Q: 1.)fluorine-20 Express your answers as integers separated by a comma. 2.)cobalt-63 Express your…

A: Let   MEA  where , E = element                 A= atomic number =Number of protons…

Q: Gallium consists of 60. % 69Ga and 40. % 71Ga. Arsenic has only one naturally occurring isotope.…

A: Gallium has two isotopes 69Ga and 71Ga  with ratio of abundant 60 % and 40 % . Therefore intensity…

Q: Calculate the exact masses of the ions C5H8O1 and C6H12 1, both of which have a nominal mass of 84.…

A: The organic compounds can be identified by various characterisation techniques. For example, NMR,…

Q: Determine the mass of 5.0x10^23 tungsten (w) atoms

A: One mole of any substance will have 6.023× 1023 . Therefore number of moles in 5.0× 1023 atoms,…

Q: The nonprescription pain relievers Advil and Nuprin contain ibuprofen 1C13H18O22, whose molecular…

A: Given, Molar Mass of Ibuprofen(C13H18O22) = 206.3 g/mol                                Number of…

Q: Calculate the percent of calcium in Ca3(PO4)2 to four significant figures.

A: Calculate percentage Ca as follows

Q: 6. How many hydrogen atoms are there in 0.75 mol of C,H10O?

A:

Q: Calculate the mass in grams of each of the following and provide the answer in scientific notation…

A: The number of moles is equal to the ratio of mass to the molar mass of the atom. It is denoted by n.…

Q: An aluminum-containing compound has the formula Mg, Al,0, and is 44.98% oxygen by mass. What is the…

A: Given: mass percent of O = 44.98 % Formula of compound: MgxAlyO4 molar mass of O = 16 g/mol molar…

Q: How many aluminum atoms are there in 3.50 grams of Al₂O₃? (At. Wts.: Al = 27, O =16) a. 4.13 x 10²²…

A: Mass of Al2O3 = 3.50 g Molar mass of Al = 27 g/mol Molar mass of O = 16 g/mol Molar mass of Al2O3 =…

Q: JESTION 8 In the certain hydrated salt MSO3-4H2O, the mass percentage of H2O is 44.71%. Identify the…

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

Q: g) How many grams of K2C2O4, potassium oxalate, would contain 182 grams of pure potassium?

A: One mole of K2C2O4 has two moles of potassium.   The molar mass of K2C2O4 is 166.22 g/mol   And…

Q: How many grams of lithium are in 8.52 x 1023 atoms?

A: 1 mole of any species contains Avogadro's number of atoms or molecules. i.e, 6.023 × 1023  Molar…

Q: 1. How many moles of tungsten atoms are there in 4.8 x 1025 atoms of tungsten?

A: Since you have asked multiple question,as per our company guidelines we are supposed to answer the…

Q: 1.00 g of hydrated potassium carbonate, K2CO3•nH2O, is heated to 250 °C to give 0.836 g anhydrous…

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.