A mass-spectrometer is an instrument that is used to measure the masses of molecules. Molecules of a gas are ionised and travel through a vacuum in a narrow tube. The ions enter a region of uniform magnetic flux density B where they are deflected in a semicircular path as shown. region of magnetic flux density B movable detector beam of positive ions narrow tube The ions have a charge of +2e and a speed of 148 km/s. When B has a value of 840 mT, the ions are detected at a point where the diameter of the arc is 19 cm. Calculate the mass of ions in kg. Write the answer with atleast 3. S.F.

A mass-spectrometer is an instrument that is used to measure the masses of molecules. Molecules of a gas are ionised and travel through a vacuum in a narrow tube. The ions enter a region of uniform magnetic flux density B where they are deflected in a semicircular path as shown. region of magnetic flux density B movable detector beam of positive ions narrow tube The ions have a charge of +2e and a speed of 148 km/s. When B has a value of 840 mT, the ions are detected at a point where the diameter of the arc is 19 cm. Calculate the mass of ions in kg. Write the answer with atleast 3. S.F.