Introducing chemical reactions

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Question 43
Easy

A student investigates the highly exothermic reaction of solid sodium metal with excess liquid water to form an aqueous solution of sodium hydroxide and hydrogen gas. Which of the following chemical equations correctly represents this reaction, including the appropriate state symbols under standard laboratory conditions?

2Na(aq)+2H2O(l)→2NaOH(aq)+H2(g) 2\text{Na}(\text{aq}) + 2\text{H}_2\text{O}(\text{l}) \rightarrow 2\text{NaOH}(\text{aq}) + \text{H}_2(\text{g}) 2Na(aq)+2H2​O(l)→2NaOH(aq)+H2​(g)
2Na(s)+2H2O(aq)→2NaOH(aq)+H2(g) 2\text{Na}(\text{s}) + 2\text{H}_2\text{O}(\text{aq}) \rightarrow 2\text{NaOH}(\text{aq}) + \text{H}_2(\text{g}) 2Na(s)+2H2​O(aq)→2NaOH(aq)+H2​(g)
2Na(s)+2H2O(l)→2NaOH(aq)+H2(g) 2\text{Na}(\text{s}) + 2\text{H}_2\text{O}(\text{l}) \rightarrow 2\text{NaOH}(\text{aq}) + \text{H}_2(\text{g}) 2Na(s)+2H2​O(l)→2NaOH(aq)+H2​(g)
2Na(s)+2H2O(l)→2NaOH(l)+H2(g) 2\text{Na}(\text{s}) + 2\text{H}_2\text{O}(\text{l}) \rightarrow 2\text{NaOH}(\text{l}) + \text{H}_2(\text{g}) 2Na(s)+2H2​O(l)→2NaOH(l)+H2​(g)

Introducing chemical reactions Questions

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