Răspuns :

Răspuns:

2Ca+O2=>2CaO

MCa=40g/Mol

MCaO=40+16=56g/mol

M O2=2×16=32g/mol

2×40gCa...32gO2...×56gCaO

20gCa...x...y

x=8g

O2=>0,25moli O2

y=26g

CaO=>0,5moliCaO