Răspuns:
M,NaCL=58,5g/mol
M,KCl= 74,5g/mol
amestec format din a moli NaCl si b moli KCl
a/b= 2/1
58,5a+74,5b= 38,3
rezolvand sistemul, rezulta a=0,4mol b=0,2mol
0,6mol amestec.......0,4mol NaCl......0,2mol KCl
100mol..........x.................................y
calculeaza x si y !!!!!!!!!
38,3gamestec.....0,4x58,5g NaCl.......0,2x74,5g KCl
100g........................................x..............................y
calculeaza x si y !!!!!!!!
Explicație:
