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xgS - 450gR
x= 128,6gS
128,6gS - 450gR
x - 100gR
x = 28,6%
gS - gram substancji
gR - gram roztworu
Odp. Stężenie procentowe wynosi 28,6%
40g soli------140g roztworu(40g soli + 100g roztworu)
xg soli--------450g roztworu
x=128,6g soli
Z def. stęż. procent.
128,6g soli-----450g roztworu
xg soli----------100g roztworu
x=28,58g soli
x=28,58%