Quantitative Information from Balanced Equations
Remark: In a balanced equation, reactants and products are equivalent to each other.
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.
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 on Mass Produced from Burning Butane
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Solution to the Exercise on Mass Produced from Burning Butane
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Date of last modification: Summer , 2019