Question

Counting by Weighing 1 Compatibility Mode- Saved to my Mac esign Layout References Mailings Review View Emphasis Normal Subee Counting by Weighing: An Avogadro's Number Determination Analogy Bonus :1pt The mole concept of "counting by weighing" is illustrated in the BB analogy.The mole is defined as Avogadro's number of units,i.e. 6.022 x 1023 atoms,ions, or molecules. Avogadro's number has been determined in a number of methods by radioactive decay,electrolytic analysis,X-ray diffraction and monomoleculat layer of oil- the classic experiment. Our BB analogy will be approached as the monolayer of BBs confined in a given area.The BBs are made of lead which has a density of 11.3 g/cm3.If we make several basic assumptions,especially that of a monolayer one BB thick is in a confined petri dish of known dimensions.The volume of the BB's can be calculated from the density and mass data. If the area can be calculated from the dimensions of the petri dish ,then the thickness follows ,t-V/A.we will assume also each BB is spherical V-4/3Tr3 ,in which 2r-t,why? From the following data calculate the number of BB's in the petri dish. 1. a. diameter of petri dish 8.75 cm b. mass of BBs 81.204 grams 2. What are several possible errors in the determination of the number of BBs ? MacBook Air

it due tonight. please, help me.

Answer 1

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