Question

otetul este o solutie de acid acetic si apa.Ce cantitate de apa se afla intr-o sticla de 500 g otet de concentratie 9%

Answer 1

[tex]Raspuns:\\ ms=500g\\ C=9\%\\ ------------\\ ma=?\\ ------------\\ ms=ma+md\\ \boxed{ma=ms-md}\\ C= \frac{md}{ms} *100\\ \boxed{md= \frac{C*ms}{100} }\\\\ Inlocuim:\\ md= \frac{500*9}{100} \\\ md= \frac{4500}{100} \\ \boxed{md=45}\\ ma=500-45\\ \boxed{ma=455}. [/tex]