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100g - 3,815
mAl = 2,815*100g/3,815 = 73,8 g
mMg = 100g - MAl = 100g - 73,8 g = 26,2 g
3H2SO4 + 2Al -> Al2(SO4)3 + 3 H2
98g*3 27g*2
xg 73,8 g
x= 73,8g*98g*3/27*2 = 401,8
H2SO4 + Mg -> MgSO4 + H2
98g 24 g
yg 26,2 g
y=98g*26,2g/24g= 107g
x+y = masa całkowita H2SO4
x+y = 508,8 g