A sample of isomer W\text{W}W (C5H10O\text{C}_5\text{H}_{10}\text{O}C5H10O) was mixed with an excess of oxygen and the mixture ignited. After cooling to the original temperature, the total volume of gas remaining was 350 cm3350\text{ cm}^3350 cm3.
When this gas mixture was passed through aqueous sodium hydroxide, the carbon dioxide reacted and the volume of gas decreased to 135 cm3135\text{ cm}^3135 cm3.
Both gas volumes were measured at 22 ∘C22\text{ }^\circ\text{C}22 ∘C and 99.0 kPa99.0\text{ kPa}99.0 kPa.
Write an equation for the complete combustion of W\text{W}W in an excess of oxygen and calculate the mass, in mg, of W\text{W}W used.
The gas constant R=8.31 J K−1 mol−1R = 8.31\text{ J K}^{-1}\text{ mol}^{-1}R=8.31 J K−1 mol−1.