С7H16 + 11O2 -> 7CO2 + 8H2O
<span>1) </span><span>4Na+O2=2Na2O</span>
<span>2) </span><span>4Al+3O2=2Al2O3</span>
<span>3) </span><span>2B+3O2=2B2O3</span>
<span>4) </span><span>N+3H=NH<span>3</span></span>
СаС2+2Н2О=Са(ОН)2+С2Н2
m(CaC2)без примесей=1800*0,8=1440г
n(CaC2)=m(CaC2)/Mr=1440/64=22,5моль
1————————1
22,5моль———n(C2H2)
V(C2H2)=n(C2H2)*Va=22,5*22,4=504л