11. Exercises IV

2 m.

Choose all possible answers:

1. Which of the statements about the reaction below are incorrect?
\(2PbO\)(s) + \(C\)(s) → \(2Pb\)(s) + \(CO_2\)(g)

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

Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

\(2K\) + \(2H_2S\) → \(2KOH\) + \(H_2\)
\(2K\) + \(2H_2N\) → \(2KOH\) + \(H_2\)
\(2K\) + \(2H_2O\) → \(2KOH\) + \(O_2\)
\(2K\) + \(2H_2O\) → \(2KOH\) + \(H_2\)
\(2K\) + \(3H_2O\) → \(2KOH\) + \(H_2\)

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