he Mole Reassessment (MC) Identify the correct mathematical calculation to determine the number of molecules in 20.0 grams of water. O multiply by the formula mass of water O divide by the formula mass of water O multiply by Avogadro's number O divide by Avogadro's number O multiply by Avogadro's number and multiply by the formula mass of water O multiply by Avogadro's number and divide by the formula mass of water O divide by Avogadro's number and multiply by the formula mass of water O divide by Avogadro's number and divide by the formula mass of water 7. 8 9.

Q: A sample of monochloro tetraborane (10), B4H9Cl, contains 2.5 mol of the compound. Determine the…

A: The objective of the question is to determine the amount in moles and the number of atoms of each…

Q: If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the…

A: Given, mass of methanol = 94 g C= 2.51 J/K g Tf = 79°C = 273+79 = 352 K Ti = 26°C = 273 + 26 = 299 K…

Q: 2. A compound contains 76.56% C, and 6.43% H. The molar mass of the compound is 282.0 g/mol.…

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Q: How many molecules are in sample? 85.26 g CCl4

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Q: What is the empirical formula of a compound composed of 30.5 g of potassium (K) and 6.24 g of oxygen…

A: The given compound contains potassium and oxygen.Then,

Q: Determine the mass of the sample below. a) 9.11 x 1023 molecules of C15H21N3O15

A: Consider the given information is as follows; Molecules of C15H21N3O15 = 9.11×1023  Mass of…

Q: Determine the number of moles (of molecules or formula units) in sample. 155.2 kg Na2SO4

A: Record the given data, The given mass of Na2SO4 is 155.2 kg which is converted to grams as 155.2 x…

Q: 1. Complete the table below: Name Formula Molar Mass (include units!) sodium sulfate C3N4 magnesium…

A: This question is related to nomenclature part of chemistry. The name of compound is written using…

Q: What is the mass of 4.22 mole of Cl2   How many Cl2 molecules are in 4.22 mole of Cl2

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Q: The Mole Reassessment (MC-o) Identify the correct mathematical calculation to determine the number…

A: Welcome to bartleby !

Q: Draw the condensed structural formula of 2-ethyl-3-fluoroheptanal. Draw the line-bond structure…

A: The given molecule is 2-ethyl-3-fluoroheptanal.

Q: A 13.80 g sample of a compound contains 8.81 g of iron, Fe, 1.63 g of phosphorus, P, and oxygen, O.…

A: Step 1: The empirical formula, the simplest formula for a compound, is the ratio of subscripts of…

Q: How many Fluoride atoms are in 3.0 moles of sulfur hexafluoride molecules

A: The objective of the question is to find out the number of Fluoride atoms in 3.0 moles of sulfur…

Q: An unidentified ionic compound contains approximately 29.85 g sodium, 67.50 g chromium, and 72.67 g…

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Q: number of atoms found in 2.1 mol of N2

A:

Q: What is the empirical formula of a compound composed of 27.7 g of potassium (K) and 5.67 g of oxygen…

A: Empirical formula: The simplest positive integer ratio of atoms present in a compound is known as…

Q: How many molecules are in sample? 22.1 g O2

A: 1 molecular mass of gas contains 1 mole molecules for oxygen. Oxygen has 32 g molecular mass. Number…

Q: Can you determine the molecular formula for a compound from its percent composition? Explain your…

A: Molecular formula depicts the exact formula of  compound, that is, the actual or exact number of…

Q: Determine the number of molecules present in 0.220 g of NH3

A: In this question, we will determine the number of molecules of NH3 How we can determine the number…

Q: How many moles of C (element number 6) are in a 471.2 g sample? 1.  19.62 mol 2.  39.23 mol 3.…

A: Given  Mass of carbon sample       = 471.2 gram  Number of mole of carbon =   ?

Q: how many moles of atoms are contained in the following  44.0g Br2 14.8 g CH3OH 4.20 lb ZnI2 25.0…

A: We know that ,no.of mole = Mass / molar mass  1.  No.of mole of 44.0g Br2 = 44/ 159.808= 0.27 2.No.…

Q: Convert 28.50 grams of Fe (OR F e) to moles. Do not type units with your answer. The atomic weight…

A: Given : mass of Fe = 28.50 g

Q: Given the following masses of samples, find the total number of molecules and total number of atoms…

A: The atomic mass of substance is used for calculating the number of moles. One mole of any substance…

Q: Calculate the number of molecules in 90.3 g Fe

A: Given that, mass of Fe = 90.3 g No. of molecules (Atoms) in Fe = ?

Q: A compound has the following percent composition: 92.81% bromine, 7.19% phosphorus. Find the…

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Q: on, hydrogen and oxygen 180.16 g/mol.

A: a) moles of C = ( 3.66g / 44.0gmol-1 ) = 0.83mol .......(1)  Mass of C = ( moles of C ) • ( atomic…

Q: Convert 0.377 g aluminum to moles of aluminum. Group of answer choices 71.6 moles 0.140 moles 28.4…

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Q: 22) An 85.5-g sample of Hg in a barometer 23) A 0.251-g Ti metal heart valve 24) A 10.0-g sample of…

A: 22) Given: Mass of Hg = 85.5 g Atomic mass of Hg = 200.59 g/mol.

Q: Determine the number of molecules in 18.6 grams of NH₃

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Q: What is the empirical formula of a compound composed of 23.5 g of potassium (K) and 4.81 g of oxygen…

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Q: How many molecules are in sample? 19.3 g C8H10

A: Evergy compound/substance carries a specified relation between its moles and its molecules. This…

Q: Can you determine the molecular formula for a compound from its percent composition? Explain in…

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Q: A crime scene investigator finds a 3.5 g (C10H14N2) sample of nicotine and sends it to the lab for…

A: Please find the attachment.

Q: Consider 1.00 g of Copper (Cu) metal. How many Cu moles are present in this sample? How many Cu…

A: Since moles of element = mass of element / Atomic mass of element  Atomic mass of Cu = 63.5 g/mol…

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.