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Mistake Master · AP Chemistry · Unit 1 · Step-Through Animation

Weighing a Sample You Can Only Count

You'll learnhow the mole turns grams you can weigh into the number of molecules actually reacting.

A balance holds 36 grams of water. The reaction it is about to run cares how many molecules are on that pan, and no balance will ever print that number. Twelve short steps; press Next for each one.

12 STEPS · 6 QUICK CHECKS · NA = 6.022 × 10²³ /mol · v3

grams on the pan · molecules in the reaction · one bridge between
Before you start
What you're looking at
A balance holding 36 grams of water, and a box of the molecules that are in it.
The question
How many molecules are on a pan you can only read in grams?
Step 1 / 12