What is Quantitative Inf. from Balanced Equs.

Introduction

Remark: In a balanced equation, reactants and products are equivalent to each other.

Example

**Information from Balanced Equations**
Equation	2H₂(g)	+	O₂(g)	→	2H₂O (l)
Molecules	2 Molecules H₂	+	1 molecule O₂	→	2 molecules H₂O
Amount (mol):	2 mols H₂	+	1 mol O₂	→	2 mols H₂O

This is a balanced equation, hence we can say, 2 mol of H₂ are equivalent to 1 mol of O₂, and to 2 mol of H₂O

Based on these equivalences, we can say that:

Two mol of H₂ are needed to produce 2 mol of H₂O
One mol of O₂ is needed to produce 2 mol of H₂O
Two mol of H₂ are needed for each 1 mol of O₂ to produce 2 mol of H₂O

Hence, if # mol of any reactant is known, # mol of the product can be calculated as long as both are represented in a balanced equation.

Note:
A balanced equation contains the correct # mol for each of the reactants and products.
If their masses (in grams) were given instead, these should be converted into mol using the conversion equation between them.

Exercise

Exercise: Mass Produced from Burning Butane

Check your answers here:
Solutions

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