The equation below represents the complete combustion of butane.
C$_4$H$_{10}$(g) + 6$\frac{1}{2}$O$_2$(g) $\to$ 4CO$_2$(g) + 5H$_2$O(g)
20 cm$^3$ of butane are completely burned in 0.20 dm$^3$ of oxygen. Which statement is correct?
All volumes are measured at the same temperature and pressure.
1 )
40 cm$^3$ of carbon dioxide are formed
2 )
0.065 dm$^3$ of oxygen react
70 cm$^3$ of oxygen remain
4 )
0.50 dm$^3$ of steam are formed
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