Question #cca44

1 Answer
zhirou
Feb 8, 2018

#"10g"# of sodium. :)

Explanation:

This is our balanced equation:

#2Na + 2H_2O -> 2NaOH + H_2#

From this, we can tell that for every #1# mole of water that reacts, exactly #1# mole of sodium must also react.

#"8g"# of water is:

#8/("molar mass of water") = 8/18 = "0.44 moles"#

So, this means that #"0.44 moles"# of sodium must also react. Let's convert that to mass:

#0.44 xx "molar mass of sodium" = 0.44 xx 23 = "10g"#.

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