tolong jawab 1 dan 2 penting bangat ni brow!!!

1.
S =gr/mr x 1000/v
s=4,5/58 x 1000/500
s=4,5/58 x 2
s=9/58
s= 0,1

2.
S = 1,34 mol/L
V = 200 mL = 0,2 L
m = ?

mol = s x V
mol = 1,34 x 0,2
mol = 0,268 mol

massa = mol x Mr
massa = 0,268 x 322
massa = 86,296 gram