The compound iron (II) chloride trihydrate has ____ mole(s) of water for every ____ mole(s) of ionic compound.
three, two
two, three
three, one
one, three
To determine the number of moles of water for every mole of the ionic compound iron (II) chloride trihydrate, we need to understand the chemical formula of the compound.
The chemical formula "iron (II) chloride trihydrate" indicates that the compound contains three components: iron (II) chloride (FeCl2) and three moles of water (H2O).
From the formula, we can see that for every one mole of iron (II) chloride (FeCl2), there are three moles of water (H2O). Therefore, the correct answer is:
Three moles of water for every one mole of iron (II) chloride.