Answer:
47.8 %
Explanation:
Ar of Zn = 65
Mr of ZnCl2 = 65 + (2 * 35.5)
= 65+ 71
= 136
Percentage Composition
= ( Ar of element × No of atom in formula ) / Mr of compound * 100 %
% composition of Zn = ( 65*1 )/ 136 × 100 %
= 47.7941...
= 47.8 % ( 3 s.f )
