5.2 External Standard Calibration

[@norhaimadibaratun8350]

Why can't the prof in the university teach like you? They just keep giving us procedures of the lab activities we don't know the concept or purpose of. Thank you very much, Sir. Great explanation.

[@chetaelena3317]

thank u!!!!!!!!!!!

[@rawaahaf]

Thank you sooo much 😍💜💜💜💜

[@sureshmadhavan3697]

Clear explanation..great

[@rholin0997]

"left over boat parts..." 🤣