Question

1. explain how the model you developed shows that when oxygen combines with hydrogen to form water, no atoms are left over from the reaction. formation of water reaction

Explanation:

The model shows the balanced chemical equation \(2H_2 + O_2
ightarrow 2H_2O\). On the reactant side, there are \(4\) hydrogen atoms (\(2\times2\) from \(2H_2\)) and \(2\) oxygen atoms (\(1\times2\) from \(O_2\)). On the product side, in \(2H_2O\), there are \(2\times2 = 4\) hydrogen atoms and \(2\times1= 2\) oxygen atoms. Since the number of each type of atom (hydrogen and oxygen) is the same on both sides of the equation, no atoms are left over.

Answer:

The model represents a balanced chemical equation. In \(2H_2+O_2
ightarrow 2H_2O\), the number of hydrogen atoms: \(2\times2 = 4\) (reactants) and \(2\times2 = 4\) (products). The number of oxygen atoms: \(1\times2=2\) (reactants) and \(2\times1 = 2\) (products). Equal atom counts on both sides mean no atoms are left over.