To balance the modified equation where you have 3 molecules of H₂ instead of 2, the new equation would look like this:
3 H₂ + O₂ → 3 H₂O
Now, let's evaluate the provided responses:
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The equation will produce three molecules of water. - This statement is correct. The balanced equation shows that 3 molecules of H₂ yield 3 molecules of H₂O.
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Each oxygen molecule will combine with 2 hydrogen molecules with no leftover molecules. - This statement is incorrect in this context. Each O₂ molecule actually combines with 3 H₂ molecules in this case.
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The result of the equation will be the same. - This statement is incorrect as changing the coefficients results in a different overall reaction in terms of the number of water molecules produced.
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It is not possible to produce water without leftover molecules. - This statement is incorrect as shown in the balanced equation; no leftover molecules occur when 3 H₂ is paired with 1 O₂.
Therefore, the correct statement in this context is: The equation will produce three molecules of water.