Răspuns:
Explicație:
d, in(165+153)g amestec.....3molO........3x6,023x10²³ atomiO\
X............................................................18,069x10²⁴ atomi
x= 318 x10g= 3180g= 3,18kg
e.(2x165+3x153)g amestec........(2mol+6mol)O...........8x16gO
x.......................................................................................12,8g
x= 789/10g= 78,9g amestec