Question

ex 4 și 6 . dau coroana .

Answer 1

4) M CO2=44 g/mol
44g CO2......12g C.....32g O2
8800g CO2....x g C....y g O2
y=800·32/44=6400g O2

1 mol O2.....32g
x moli O2.......6400g
x=6400/32=200 moli