Question

predict the product in the synthesis reaction below:
au (s) + n₂ (g) → ______

1. aun₂
2. aun₃
3. au₃n
4. au₃n₂
5. aun

Explanation:

Step1: Determine oxidation states

Au is in 0 (elemental), N₂ is 0. In product, Au likely +3 (common), N likely -3 (nitride).

Step2: Balance charges

For Au³⁺ and N³⁻, formula: AuN (since 3+ and 3- balance: \( \text{Au}^{3+} + \text{N}^{3-}
ightarrow \text{AuN} \)).

Step3: Check reaction type

Synthesis: \( \text{Au} + \text{N}_2
ightarrow \text{AuN} \) (balance: \( 2\text{Au} + \text{N}_2
ightarrow 2\text{AuN} \)), so product is AuN.

Answer:

1. AuN