mMg=24u
mBr2=160u
MgBr2=184u
Mg + Br2---->MgBr2
24g Mg---------160g Br2xg Mg-----------8g Br2x = 1,2g Mg (magnez został użyty w nadmiarze)
160g Br2--------184g MgBr28g Br2-------------xg MgBr2x = 9,2g MgBr2
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mMg=24u
mBr2=160u
MgBr2=184u
Mg + Br2---->MgBr2
24g Mg---------160g Br2
xg Mg-----------8g Br2
x = 1,2g Mg (magnez został użyty w nadmiarze)
160g Br2--------184g MgBr2
8g Br2-------------xg MgBr2
x = 9,2g MgBr2