D is the correct answer......
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Answer:

Explanation:
The intermediates are the products of all the steps of the reaction pathway, with the exception of the last one. So the intermediates will be:
- N2O2 from the first step
- N2O from the second step
The list from reactant to final product:

<em>Note: the water is considered a by-product, given that is not the product of interest in this steps.</em>
Strontium and chlorine react to form strontium chloride with the formula SrCl2.