General Chemistry

General Questions

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Determining the Molar Mass of FeCl₃

The molar mass of a compound is the sum of the atomic masses of its constituent elements, each multiplied by the number of times that element is present in the compound. In this analysis, we will calculate the molar mass of ferric chloride, commonly represented as FeCl₃.

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Step 1: Identify the Constituent Elements and Their Quantities 

FeCl₃ is composed of:

<ul>
	<li>One atom of iron (Fe)</li>
	<li>Three atoms of chlorine (Cl)</li>
</ul>

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Step 2: Determine the Atomic Masses of the Constituent Elements Using the Periodic Table: 

<ul>
	<li>Atomic mass of iron (Fe) &asymp; 55.85 g/mol</li>
	<li>Atomic mass of chlorine (Cl) &asymp; 35.45 g/mol</li>
</ul>

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Step 3: Calculate the Molar Mass of FeCl₃ 

To determine the molar mass of FeCl₃, multiply the atomic mass of each element by the number of times it appears in the compound, and then sum these values.

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Molar&nbsp;mass&nbsp;of&nbsp;FeCl₃ = (Atomic&nbsp;mass&nbsp;of&nbsp;Fe &times; Number&nbsp;of&nbsp;Fe&nbsp;atoms) + (Atomic&nbsp;mass&nbsp;of&nbsp;Cl &times; Number&nbsp;of&nbsp;Cl&nbsp;atoms)

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Substituting in the values we have:

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Molar&nbsp;mass&nbsp;of&nbsp;FeCl₃ = (55.85&nbsp;g/mol &times; 1) + (35.45&nbsp;g/mol &times; 3)

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Molar&nbsp;mass&nbsp;of&nbsp;FeCl₃ = 55.85&nbsp;g/mol + 106.35&nbsp;g/mol

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Molar&nbsp;mass&nbsp;of&nbsp;FeCl₃ = 162.20&nbsp;g/mol

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The molar mass of FeCl₃ is 162.20 g/mol.

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Question

Calculate molar mass of fecl3.

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