\(n_{Na}=\dfrac{3,68}{23}=0,16\left(mol\right)\\ PTHH:4Na+O_2\underrightarrow{t^o}2Na_2O\left(natri.oxit\right)\\ Theo.pt:n_{O_2}=\dfrac{1}{4}n_{Na}=\dfrac{1}{4}.0,16=0,04\left(mol\right)\\ V_{O_2}=0,04.22,4=0,896\left(l\right)\)
4Na+O2-to>2Na2O
0,16---0,04------------0,08
Na2O :natri oxit
n Na=\(\dfrac{3,68}{23}\)=0,16 mol
=>m Na2O=0,08.62=4,96g
=>VO2=0,04.22,4=0,896l