Identify the class of the italicized pronoun(s) in the sentence. einstein himself would be amazed the growth in technology based on his theories.

There is only one pronoun in the sentence, and that is the word himself. That pronoun can be either reflexive (I kicked myself) and intensive (used for emphasis). The difference is, when you delete the intensive pronoun from the sentence, it will still make sense. So here, the pronoun himself is an intensive pronoun.