Answer to Question #217443 in General Chemistry for Joe

Question

Naturally occurring oxygen and naturally occurring hydrogen are sparked and the resulting gaseous product are passed through a mass spectrometer.9 peaks of the resulting product were obtained

i.account for the 9 peaks

ii.how could you use the 9 peaks to calculate the relative molecular mass of water

Answer 1

Electron impact ionisation occurs in a stainless steel chamber (Figure 2) at a pressure of less than 6 × 10⁻⁷ mmHg (i.e. vacuum conditions) achieved by means of a diffusion oil pump or a turbo-molecular pump. At 2000°C by thermoelectronic effect, electrons emitted by a rhenium filament are accelerated to the anode by a 5–100-V potential difference