In each of these problems the ions entering the mass spectometer have the same charges. The ions enter the magnetic field with equal kinetic energy. Use this atomic mass values : 12c, 12. 00 u; 14c, 14,00 u, 16o, 15. 99 u. The conversion between atomic mass units and kilograms is 1 u = 1. 66x10⁻²⁷

A sample containing 12c, 16O, and an unknown isotope is analyzed in a mass spectrometer. the ions move around a semicircle before striking a photographic plate. The 12C and 16O ions are separated by 2. 250 cm on the plate, and the unknown isotope strike the plate 1. 160cm from the 12C ions. what is the mass of the unknown element ?