When acetone vapour is irradiated with light of wavelength 313 nm it decomposes to form ethane and carbon monoxide (ch)h +hv-c,h, +c0 using a reaction cell of 6

When acetone vapour is irradiated with light of wavelength 313 nm it decomposes to form ethane and carbon monoxide (CH)h +hv-C,H, +C0 Using a reaction cell of 60.3 cm' capacity and a temperature of329 K irradiation for 23 000 s athe rate of 8.52 x 10 Js produced a change in pressure from 760.0 to 790.4 mmbHg. Calculate (a) the number of molecules of acetone decomposed, and (b) the quantum yield.