Pentane gas (C5H12) combusts with oxygen gas (O2) to form water (H2O) and carbon dioxide (CO2). Write a balanced chemical equation for this reaction and explain the scientific principle (statement) that requires the balancing of an equation to make it conform to reality.
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C5H12 + 8O2 = 6 H2O +5 CO2
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Reactants: C=5, H=12, O=2
Products: C=1, H=2, O=3
One of the things we can immediately notice is
that the product side has an odd number of
oxygen molecules, but oxygens are only available
to us in evenly numbered amounts (since O₂ is
the only source). This means that the products
will need to be balanced so that only even
numbers of oxygens are tallied there. The only
way to do this is to increase the amount of
water. We should keep this in mind.
Products: C=1, H=2, O=3
One of the things we can immediately notice is
that the product side has an odd number of
oxygen molecules, but oxygens are only available
to us in evenly numbered amounts (since O₂ is
the only source). This means that the products
will need to be balanced so that only even
numbers of oxygens are tallied there. The only
way to do this is to increase the amount of
water. We should keep this in mind.
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