2. Molar Conversions  How many days are in 1 week? 7 days same type of unit conversion works for moles UnitUsed to measureHow many? 1 weekDays7 1 moleNumber of particles: atoms formula units (f.u.) molecules (mlcls) ions 6.02 x 10 23 1 moleLiters of gas (L) (at STP: 1 atm, 273K) 22.4 1 moleMass (g)Molar mass from the Periodic Table

3.  How many Cl -1 ions are in 15 moles of MgCl 2 ? 15 mol MgCl 2 2 mol Cl -1 6.02 x 10 23 ions Cl 1- 1 mol MgCl 2 1 mol Cl -1 =1.8 x 10 25 ions Cl 1-

4. Molar mass 1 mol P 2 O 3 (2 P + 3 O) P 30.974 x 2 O15.999 x 3 = 109.945 g P 2 O 3 1 mol Al(ClO 2 ) 3 (1 Al + 3 Cl + 6 O) Al26.982 Cl35.453 x 2 O15.999 x 6 = 229.335 g Al(ClO 2 ) 3