Middle School Physical Science Quiz
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MATTER AND ITS INTERACTIONS
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Multiple particle models are proposed. Only ONE correctly conserves atoms. Which reaction has matching atom counts for every element? 1) CH4+2O2→CO2+2H2O\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} 2) 2H2+O2→H2O2\text{H}_2 + \text{O}_2 \rightarrow \text{H}_2\text{O} 3) N2+H2→2NH3\text{N}_2 + \text{H}_2 \rightarrow 2\text{NH}_3
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