In one mole of calcium fluoride (CaF2), there are two moles of fluorine (F). This is because the chemical formula CaF2 indicates each molecule contains one calcium atom (Ca) and two fluorine atoms (F). Therefore, for every mole of CaF2, there are twice as many moles of fluorine.

There are 2 moles of fluorine (F) in 1 mole of calcium fluoride (CaF2).

To understand this, let's break it down step by step:

1. The chemical formula of calcium fluoride is CaF2. 2. This formula means that each unit (or molecule) of calcium fluoride contains one calcium atom (Ca) and two fluorine atoms (F). 3. A mole is a unit of measurement in chemistry that denotes a specific quantity of atoms or molecules. One mole of any substance contains Avogadro's number of particles (atoms, molecules, or ions), which is approximately 6.022 x 10^23 particles. 4. When we say "1 mole of CaF2," we are referring to 6.022 x 10^23 units of CaF2, each containing 1 calcium atom and 2 fluorine atoms. 5. Therefore, in 1 mole of CaF2, there are 1 mole of calcium atoms and 2 moles of fluorine atoms because the ratio of calcium to fluorine in the formula is 1:2.

So for each mole of CaF2, you get twice that amount—in moles—of fluorine atoms. Hence, in 1 mole of CaF2, there are 2 moles of fluorine.