In a mass spectrometer, single ionized atoms (one electron removed) are first accelerated through a voltage of 18.0 kV, and then directed into a region of uniform magnetic field of 0.250 T. The ions are observed to follow o circular path of 26.8 cm radius. Calculate:

a) the mass of the ion.

b) the speed of the ion as it entered the magnetic field. (5 points)