   # Aluminum reacts with Cl 2 to form AlCl 3 . If you have 0.40 mol of Al, what amount (moles) of Cl 2 is needed for a complete reaction? (a) 0.40 motes Cl 2 (b) 0.60 moles Cl 2 (c) moles Cl 2 (d) 1.2 moles Cl 2 ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 4.1, Problem 1RC
Textbook Problem
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## Aluminum reacts with Cl2 to form AlCl3. If you have 0.40 mol of Al, what amount (moles) of Cl2 is needed for a complete reaction? (a) 0.40 motes Cl2 (b) 0.60 moles Cl2 (c) moles Cl2 (d) 1.2 moles Cl2

Interpretation Introduction

Interpretation: The amount of Cl2 (mole) required to complete the given reaction has to be determined from the given options.

Concept introduction:

• Numberofmole=GivenmassofthesubstanceMolarmass
• The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
• For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
• Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.
• Stoichiometric factor is a relationship between reactant and product which is obtained from the balanced chemical equation for a particular reaction.

### Explanation of Solution

Balanced chemical equation for the given reaction is,

2Al(s)+3Cl2(g)2AlCl3(s)

Using the stoichiometric factor calculating the amount of chlorine required based on the amount of aluminum ( 0.40molAl ) as follows,

0.40molAl×3molCl22molAl=0.60molCl2

0

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