<span>4Na+O2--> 2Na2O
</span><span>Na2O+2HCl --> 2NaCl+H2O </span>
1. CaO + CO2 = CaCO3
2. 2CaCO3 + 5C = 2CaC2 + 3CO2
Na2O + H2O= NaOH
K2O + H2O = KOH
Na x C y O z = 43,4%:11,3%:45,3%
23x 12y 16z = 43,4:11,3:45,3
x:y:z=43,3/23 : 11,3/12 : 45,3/16 = 1.88:0,94:2,83
x=1,88/0,94=2
y=0.94/0.94=1
z=2,83/0,94=3
Ответь; Na2CO3