Question

Chimie !!! 100 puncte
Vreau si datele​

Answer 1

Vs1 = 300 cm3, ro1 = 1,18 g/cm3 si c1% = 30%

din ro = ms/Vs => ms = roxVs

=> ms1 = ro1xVs1 = 300x1,18 = 354 g

Vs2 = 500 cm3, ro2 = 1,32 g/cm3 si c1% = 50%

=> ms2 = ro2xVs2 = 500x1,32 = 660 g

ms.tot = ms1+ms2 = 354 + 660 = 1014 g

din c% = mdx100/ms

=> md1 = ms1xc1/100

= 354x30/100 = 106,2 g

=> md2 = ms2xc2/100

= 660x50/100 = 330 g

=> md.tot = md1+md2 = 106,2+330 = 436,2 g

=> c%.final = md.totx100/ms.tot

= 436,2x100/1014 = 43%