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# Chapter 1-2 Mole concept

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Easy way to understand moles. 1 mole has the same number of particles present in 12 grams of Carbon-12. Carbon-12 is an isotope of carbon which is taken as standard. Mass of 1 mole of atoms = Atomic mass, Mass of 1 mole of molecules = molecular mass.

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### Chapter 1-2 Mole concept

1. 1. Small   Large  in   number   Diﬃcult   to  count   Diﬃcult   to  weigh   ATOM
2. 2. One  mole  of  substance  is  the  amount  of  substance  that   has  the  same  number  of  par<cles  as  there  are  in  12g  of   Carbon-­‐12.   Mole
3. 3. Like :! ! 1 dozen = 12! 1 pair = 2! ! Similarly:! 1 mole = 6.022 x 10 23 of anything! !
4. 4. What is Avogadro number? Avogadro number = 6.022 x 10 23!
5. 5. What is Atomic Mass in terms of moles? Mass of 1 mole of atoms = Atomic mass!
6. 6. What is Molecular mass in terms of moles? Mass of 1 mole of molecules = molecular mass!
7. 7. Conversions-­‐  Mole  and  Mass
8. 8. Conversions-­‐  Mole  and  Mass   How many moles of Carbon are present in 24 grams of Carbon?!
9. 9. Conversions-­‐  Mole  and   Number  of  atoms/molecules
10. 10. Conversions-­‐  Mole  and   Number  of  atoms/molecules   How many atoms of Carbon are present in 2 moles of Carbon?!