Respostas

  • Usuário do Brainly
2013-10-09T22:20:50-03:00
Massa =
3xCa + 2xFe +12xC +12xN =
3x40 +2x56 +12x12 +12x14 =
120 + 112 + 144 + 168 =
= 544.
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