Essential Chemistry for IGCSE - Formulae And Equations (Section 1 - No. 19)
In the reaction 2Na + 2H2O -> 2NaOH + H2, what does the 2 in front of NaOH represent?
The number of sodium atoms
The number of oxygen atoms
The number of NaOH molecules
The number of hydrogen atoms
Explanation
The '2' in front of NaOH indicates 2 molecules of sodium hydroxide are produced.
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