Răspuns:
in Nacl the na is 31.4 precent
the cl is 68.6 precent.
the O is 27.5 precent
the ca is 71.5 precnent
Explicație:
11 grams of soduim out of 28 grams from the whole mole is 31.4 precent
17 grams of the cl out of the 28 of the whole molecule is 68.
8 grams from the 28 is 27.5
20 grams from the 28 is 71,5
