Question

determine as massas moleculares das seguintes substâncias

Answer 1

$C_{2}H_{6}O$
C:12 - 12 x 2 = 24g
C: 1 - 6 x 1 = 6g
O: 16 - 16g
------------------------
46g

$Ca_{3}(PO_{4})_{2}$
Ca: 40 - 3 x 40 = 120g
P: 31 - 2 x 31g = 62g
O: 16 - 8 x 16g = 128g
------------------------
310g

$Al_{2}( C_{2}O_{4})_{3}$
Al: 27 - 2 x 27 = 54
C: 12 - 6 x 12 = 72g
O: 16 - 12 x 16 = 192g
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318g