Răspuns:
MH2SO4 =2×1+32+4×16=98g/mol
MHCl=1+35,5=36,5g/mol
MBaSO4= 137+32+4×16=233g/mol
98g..................................233g........2×36,5g
H2SO4 + BaCl2 => BaSO4 + 2HCl
200g................................xg..............yg
x=200×233/98=calculează
y=200×2×36,5/98=calculează