Answers

2014-11-20T07:41:33+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
2 Na + 2 H2O ===>  2 Na OH + H2

sodium atomic weight = 23 u                hydrogen molecular weight 2 u

so 46 gms of sodium will produce  1 mole = 2 gms of hydrogen.
  230 gms of  sodium  =>    10 gms  =>  5 moles  

 At STP,   5 moles contains = 5 * avogadro number 
                                           = 5 * 6.022 * 10^23    molecules

0