Introducing chemical reactions

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Question 18
Easy

Aluminium reacts with oxygen gas at high temperatures to form a protective layer of aluminium oxide. Which of the following represents the correctly balanced chemical equation for this reaction?

4Al+3O2→2Al2O34\text{Al} + 3\text{O}_2 \rightarrow 2\text{Al}_2\text{O}_34Al+3O2​→2Al2​O3​

2Al+3O2→Al2O32\text{Al} + 3\text{O}_2 \rightarrow \text{Al}_2\text{O}_32Al+3O2​→Al2​O3​

2Al+3O→Al2O32\text{Al} + 3\text{O} \rightarrow \text{Al}_2\text{O}_32Al+3O→Al2​O3​

Al+O2→AlO2\text{Al} + \text{O}_2 \rightarrow \text{AlO}_2Al+O2​→AlO2​

Introducing chemical reactions Questions

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