Answer:
The missing reactant is 55/25Mn
Explanation:
asumming the missing reagent is A/Z X
In nuclear reaction , the sum of atomic number and mass number of on both sides musst be equal
Thus ,
Z + 54 = 79 + 0
Z = 25
The element with atomic number 25 is Mn
A + 143 = 197 +1
A = 55
Therefore, the missing reagent is 55/25Mn
Answer:
c) removing fluoride ions.
Explanation:
Hello!
In this case, for this solubility product problem, it is very convenient to write the undergoing ionization reaction:
In such a way, via the Le Chatelier's principle, we remember that the addition of reactants shifts the reaction towards products, adding products shifts the reaction towards reactants, removing reactants shifts the reaction towards reactants and removing products shifts the reaction towards products. In means, that the best way to shift this reaction away from solid calcium fluoride and toward the dissolved ions is c) removing fluoride ions, because it is a product and its removal favors the formation of more products.
Best regards!