การดู
4:22
Hard & soft water | Environmental Chemistry | Chemistry | FuseSchool
4:24
Hard and Soft Water (Intro to Solid-State Chemistry)
1:00
Chemical Terms and Concepts - Odor
4:43:14
Master Chemistry 1 While You Sleep | Full Course for Beginners and Students (Sleep Learning)
0:31
Hard Water and Soft Water
6:00
Hard/Soft Acid-Base Theory
6:20
GCSE Chemistry - Group 1 Elements - Alkali Metals | Properties | Reactivity (2026/27 exams)
58:42
Acids and Bases - Basic Introduction - Chemistry