Răspuns:
Calculezi Masa
M MgSO4.7H2O=24+32+64+7*(2+16
=246 g/mol .
24g Mg....... 246 g MgSO4.7H2O
x ............ 100 g MgSO4.7H2O
x=24*100/246=9,75%
32 g S ....... 246 g MgSO4.7H2O
y ............. 100 g MgSO4.7H2O
y=32*100/246=13%
64g O .............246 g MgSO4.7H2O
z ....................100 g MgSO4.7H2O
z=64*100/246=26,01%
126g H2O .......... 246 g MgSO4.7H2O
x1 ................100 g MgSO4.7H2O
x1=126*100/246=51,21 %
IDK DACA I BINE
