Transcription of Skills Worksheet Problem Solving
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Skills Worksheet Problem Solving
Copyright by Holt, Rinehart and Winston. All rights ChemFile: Problem - Solving Workbook48 Mole ConceptMole ConceptSuppose you want to carry out a reaction that requires combining one atom ofiron with one atom of sulfur. How much iron should you use? How much sulfur?When you look around the lab, there is no device that can count numbers ofatoms. Besides, the merest speck ( g) of iron contains over a billion billionatoms. The same is true of , you do have a way to relate mass and numbers of atoms. One ironatom has a mass of amu, and g of iron contains 137 1023atoms of iron. Likewise, g of sulfur contains 137 1023atoms of sul-fur.
boron Mass of B in g 1 Number of B atoms 3 Avogadro's number given 6.022 1023 atoms B g B atoms B 1 mol B 1 molar mass B 1 mol B 10.81 g B Amount of B in mol 2 Items Data Mass of boron 2.00 g Molar mass of boron 10.81 g/mol Avogadro’s number—the number 6.022 1023 atoms/mol of boron atoms per mole of boron Number of boron atoms ? atoms
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