Question

Dot chay hoan toan 26,8 gam hon hop 3 kim loai canxi, natri, magie thay on het V1 lit khi oxi thu dc 39,6 gam hon hop 3 oxit. Dot chay hoan toan V2 lit khi metan cung can V1 lit khi oxi tren. Tinh V1, V2

Giup mik dc k

Answer 1

\(m_{O_2}=m_{oxit}-m_{hh}=39,6-26,8=12,8g\)

\(n_{O_2}=\frac{12,8}{32}=0,4mol\)

\(V_1=V_{O_2}=0,4.22,4=8,96l\)

- \(CH_4+2O_2\rightarrow CO_2+2H_2O\)

\(n_{CH_4}=\frac{1}{2}.n_{O_2}=\frac{1}{2}.0,4=0,2mol\)

\(V_2=V_{CH_4}=0,2.22,4=4,48l\)