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3 Quantitative chemistry

3 Quantitative chemistry

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Question 9
72%

When sodium reacts with oxygen, 0.20 mol of sodium (Na\text{Na}Na) reacts with 0.05 mol of oxygen gas (O2\text{O}_2O2​).

Which is the correct balanced equation for the reaction?

A

Na+O2→NaO2\text{Na} + \text{O}_2 \rightarrow \text{NaO}_2Na+O2​→NaO2​

B

2Na+O2→Na2O22\text{Na} + \text{O}_2 \rightarrow \text{Na}_2\text{O}_22Na+O2​→Na2​O2​

C

4Na+O2→2Na2O4\text{Na} + \text{O}_2 \rightarrow 2\text{Na}_2\text{O}4Na+O2​→2Na2​O

D

4Na+2O2→2Na2O24\text{Na} + 2\text{O}_2 \rightarrow 2\text{Na}_2\text{O}_24Na+2O2​→2Na2​O2​

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3 Quantitative chemistry Questions

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