Profesor de Química, Matemática y Física imparte clases particulares en Inglés

I am a Master in Theoretical Chemistry and Computational Modelling from Universitat de Barcelona. Also, I have graduated in Chemistry with a Minor in Physics at the University of Lisbon.
The classes will be taken in English, even though I understand Spanish and know how to speak a bit.
The classes are online.
If there are any Portuguese students, I can have the classes in Portuguese or English, as preferred.