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Cm=n/v
n= Cm * v
n= 0,2 * 0,3 ( 300 cm³ czyli 0,3 dm³)
n=0,06 moli
0,06 moli - xg CuSO4
1 mol - 160 g ( masa CuSO4=64+32+16*4=160 g/mol)
x=9,6 g
2. Cm=n/v
n= Cm * v
n= 0,6*0,2
n=0,12 mol
0,12 mol - xg
1 mol - 106 g (masa Na2CO3=2*23+12+16*3=106 g/mol)
x=12,72 g