Cw. Ciekawa Chemia 3 . str 24 zad . 5 .
Oblicz w jakiej ilosci roztworow o zawartosci ■ 5% C2H5OH . ■ 20% C2H5OH ■ 40% C2H5OH znajduje sie 25g alkoholu etylowego .
Daje naj ; D
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
1.
5g-100g
25g-x
x = 500 g
20g-100 g
25 g-x g
x = 125 g
40 g -100 g
25 g-x g
x = 62,5 g