Answer:
The magnitude of the magnetic field is 10.19 T.
Step-by-step explanation:
Given that,
Charge on the doubly charged molecule, q = 2e
Magnetic force,

Speed of molecule, v = 207 m/s
The angle to the direction of the field is 74.9 degrees.
We need to find the magnitude of magnetic field. The formula of magnetic force is given by :

B is magnetic field

So, the magnitude of the magnetic field is 10.19 T.