8. Exercises I

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.

Hydrogen gas combines with nitrogen to form ammonia.

\(3H_2\) + \(N_2\) → \(2NH_5\)
\(3H_2\) + \(N_2\) → \(2NO_3\)
\(3H_2\) + \(N_2\) → \(2NH_3\)
\(3H_2\) + \(N_2\) → \(NH3\)
\(2H_2\) + \(N_2\) → \(2NH_3\)

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