1) 16 x x= (16*22,4)*32=11,2
H2 + S = H2S
32 22,4
2) 25 ню-? ню(BaSO4)= (25*1)/ 142 = 0,18 mol'
Na2SO4 + BaCl2 = 2NaCl + BaSO4 (osadok)
142 1 mol'
3) 15 x x= (284*15)/ 124 = 34,4
4P + 5O2 = 2P2O5
124 284
4) 12 x m(BaCl2)= 60*0,2%= 12g
BaCl2 + Na2SO4 = 2NaCl + BaSO4(osadok)
208 233 x= (12*233)/ 208= 13,44