1. Count them
2. Trap, Mark, and Release
3. Sample Count
I hope this helps your score!!
24 gFeF3 x (1 mol FeF3/grams FeF3)
x (6.02x10^23 molecules FeF3/ 1 mol FeF3)
Just Calculate Molar Mass of FeF3 and plug into equation
Reactivity. It is the ability of matter to combine chemically with other substances.
Answer:

Explanation:
Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.
Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.
Only the species which are present in aqueous state dissociate.
Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
(a)
The balanced molecular equation will be,
The complete ionic equation in separated aqueous solution will be,
In this equation the species present are,
are the spectator ions.
Hence, the net ionic equation contains specie is

The concentration of a and b will decrease while c will increase provided all other physical quantities are kept constant in the reaction