Answer : In the reaction of Ca + [tex]F _{2} [/tex] --->Ca[tex]F _{2} [/tex], the coefficient of Ca and [tex]F _{2} [/tex] will be the same which will be 1.
Explanation : As per the rules of writing a chemical equation and balancing it properly, the number of elements in reactants side should be equal to the number of elements generated in product side. Hence when we use 1 molecule of Ca and one molecule of [tex]F _{2} [/tex] then it generates 1 molecule of Ca[tex]F _{2} [/tex].
