Calculate the mass of silver chloride required to propose it's 30 % solution in 120g of water

Dear student, 
To prepare 30% of mass/mass solution of silver chloride. 
Let the mass of silver chloride be x. 
mass of solvent =120 
total mass of solution= 120+x 
According to problem, 
100*x/(120+x) = 30
Therefore, x = 51.428 g
Regards
 

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