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Strontium and nitrogen gas react to form products in a synthesis reaction. Write a balanced reaction showing both reactants and products.

A. Sr + N → SrN
B. 3Sr + N₂ → Sr₃N₂
C. Sr + N₂ → SrN
D. Sr + N₂ → Sr₃N₂

Answer :

B. is the correct answer. Since nitrogen is a dioxide, the reactants would be Sr + N2. On the products side, it would be Sr3N2 because the +2 on Sr needs to balance the -3 charge on nitrogen. Since there are 2 moles of nitrogen on each side, that is balanced. However, there are 3 moles of Sr on the products side so there needs to be a coefficient of 3 on the reactants for Sr.

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Rewritten by : Barada

Final answer:

In the synthesis reaction between strontium and nitrogen gas, three atoms of strontium react with one molecule of nitrogen gas to form strontium nitride. The balanced chemical equation is 3Sr + N2 → Sr3N2.

Explanation:

The reaction between strontium (Sr) and nitrogen gas (N2) is a type of synthesis reaction in which the reactants combine to form a compound. For the reaction to be balanced, it would look like this:

B. 3Sr + N2 → Sr3N2

The equation shows that three atoms of strontium combine with one molecule of nitrogen gas to form one compound of strontium nitride. This is a complete, balanced equation and thus the correct choice is option B.

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