Question

V-as fi foarte recunoscătoare daca m ati ajuta. Va mulțumesc.

Answer 1

Nu pune punctele
y............40g.............................x
Fe + CuSO4 --> FeSO4 + Cu
56........180..............................64
$c = \frac{md}{ms} \times 100 \\ md = \frac{c \times ms}{100} \\ md = \frac{20 \times 200}{100} = 40 \: g \:$
a)
$x = \frac{64 \times 40}{180} = 14.22g$
b)
$y = \frac{56 \times 40}{180} = 12.44g$
c)
md= 40+12,44=52,44g
ms=200+25=225g

$c = \frac{md}{ms} \times 100 \\ c = \frac{52.44}{225} \times 100 = 23.30 \: \%$