The compound feci3 is made of ?
a(three molecules
b(one atom of iron and 3 atoms of carbon
c(one atom of iron and three atoms of chlorine
d(two atoms of iodine one atom of iron and one atom of carbon

Hello! Your answer is C, one atom of iron and three atoms of chlorine.

In this case, there is some ambiguity with "Cl". It could be C + I, or Cl. (One being carbon + iodine and the other Chlorine). However, we can see that the only choice that mentions iodine states two atoms, which is incorrect, as if it was iodine, the 3 indicates that there would be three atoms.

Therefore, Cl must be chlorine. If you look at choice C, there are three atoms of chlorine, as indicated by the 3 at the end of the Cl. There is also one molecule of Fe, as there is no number at the end of it so there has to be only one.

B is not correct, as carbon would be only "C". A is not correct as a molecule is a collection of atoms bonded together, therefore, this compound could be named a molecule, but there are not multiple molecules inside this compound.

Hope this helps!

C(one atom of iron and three atoms of chlorine

Explanation:

one atom of iron = Fe

three atoms of chlorine  = Cl₃

Fe²⁺ +  3Cl⁻ → FeCl₃

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