Răspuns:
____196 g_____x g
Ba + H2SO4 => BaSO4 + H2
____98 g______233 g
[tex]c = \frac{md \times 100}{ms} \\ \\ md = \frac{c \times ms}{100} = \\ \\ = \frac{49 \times 400}{100} = \\ \\ = 196 \: g[/tex]
M H2SO4 = 2 × A H + A S + 4 × A O = 98 g pe mol
M BaSO4 = A Ba + A S + 4 × A O = 233 g pe mol
[tex]x = \frac{193 \times 233}{98} = \\ \\ = 466g[/tex]
Succes!
