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Chapter 1: Introduction to Chemistry
— Welcome. You belong in this lab. —
Why this matters
(I've taught this for 30 years, and I still get goosebumps every time I open this chapter.)
Imagine you're holding a single drop of water in your palm. It looks so ordinary, doesn't it? But inside that tiny drop are about 1.5 sextillion molecules — that's 1,500,000,000,000,000,000,000 molecules — all tumbling, sliding, and crashing into each other billions of times every second. Chemistry is the stor
