Question

When 2.94 g of a metal combined with fluorine gas, 7.47 g of a metal fluoride formed. Given this information, calculate the mass %F in the metal fluoride that formed.

Answer 1

 The mass % F  in  the metal fluoride that is formed is  60.64%

 calculation

Step 1:  calculate the mass  of fluorine (F)

mass  of F =  mass  of  metal fluoride  -  mass of the metal

     = 7.47 g - 2.94 g= 4.53 g

Step 2:  calculate  the  % mass of F

Mass % of  F =  mass  of F / mass  of metal  fluoride  x 100

mass % of F  is therefore  =  4.53  g/ 7.47  x 100 = 60.64%