11. Solving a chemistry problem
1. Observing a suspension of the smallest particles of gummigut in water with a microscope, we found that the number of particles per unit volume at 17 C and a height difference of 0.01 cm was related as 153.8:20. The diameter of the gum particles is 4.2 * 10-5 cm, and their density is 1.2 g / cm3. Determine Avogadro´s number.
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