9. Exercises II

2 m.

1. \(Fe_2O_3\) + \(2Al\) → \(Al_2O_3\) + \(2Fe\)
The above reaction is an example of a

2. Translate the following statements into chemical equations and then balance them.

Hydrogen sulphide gas burns in air to give water and sulpur dioxide.

\(2H_2S\) + \(3O_2\) → \(2H_2O\) + \(2SO_2\)
\(2H_2S\) + \(3O_2\) → \(2H_2O\) + \(2SO_3\)
\(H_2S\) + \(6O_2\) → \(2H_2O\) + \(2SO_2\)
\(2H_2S\) + \(3O_2\) → \(2H_2O_2\) + \(2SO_2\)
\(2H_2S\) + \(3O_2\) → \(2H_2S\) + \(2SO_2\)

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