Intr-un pahar se afla 20g de saramura de concentratie 40%. Calculeaza numarul de molecule existent in solutia din pahar !!!??????? VA ROG FRUMOS E URGENT !!!!
md=ms*c/100=20*40/100=8g NaCl nNaCl=8/58,5=0,13moli care contin 0,13*6,022*10
²³perechi
(Na
⁺
Cl
ˉ
) mH2O=20-8=12 g n=12/18=0,66moli care contin 0,66*6,022*10
²³
molecule h2O TOTAL molecule=0,79*6,022*10
²³ molecule
