QueenJahaida
QueenJahaida QueenJahaida
  • 02-11-2017
  • Chemistry
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Help me please!!!!!!!!!!!!!!!!!!!!!!!!!!!

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cuanchi cuanchi
  • 06-11-2017
after the first 2 min the 20 g  are only 10g,  (1 half-life)
after other 2 more min 5g (2 half-lives)
after other 2 more min 2.5 g (3 half-lives)
after 2 more 1.25 g (4 haf lifes)



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