Răspuns:
M,KClO3= 122,5g/mol
M,O2= 32g/mol
deduc masa de clorat din ecuatia chimica
2mol............................3mol sau, in grame
2KClO3----> 2KCl + 3O2
2x122,5g..................3x32g
x.....................................16g
x=m= 16x2x122,5 / 3x32=........................calculeaza !!!!!
Explicație: