The conversion between atomic mass units and kg is: 1 a.u. = 1.66x10-27 kg.
If a molecule is "singly ionized" then it has a total electric charge of 1.602x10-19 C.
In a certain mass spectrometer a singly ionized molecule whose molecular weight is 182 a.u. moves in a circle of radius 3.4 cm with the speed of 1.9 m/s
What is the radius of the orbit of singly ionized molecule whose molecular weight is 83 a.u., if it moves with the speed of 9.1 m/s?