ࡱ> 8:7 bjbjWW 4,55 JJT 8(((((  uwwwwww$.###((# ((u#u(@9+~-a0bb6b`##############b#########J j: Mole Conversions Review - KEY Name: ________________________ Date: ______________________ 1. Convert from moles to grams. a. 10.0 mol Cr 520 g c. 2.20 x 103 mol Sn 0.261 g e. 2.40 mol N2 67.2 g 2. Convert from grams to moles. a. 72.0 g Ar 1.80 mol c. 187 g Al 6.93 mol e. 7.21 x 102 g He 1.80 x 10-2 3. Find the number of moles in each of the number of atoms or molecules. a. 1.20 x 1025 atoms of P 19.9 mol c. 4.81 x 1014 molecules of NH3 7.99 x 10-10 mol 4. Find the number of atoms or molecules in each of the number of moles. a. 1.24 mol Cl2 7.46 x 1023 molecules c. 34.02 mol Ca(OH)2 2.048 x 1025 molecules 5. Convert the following. a. Find the number of molecules in 60.0 g of N2O. 8.21 x 1023 molecules e. Find the mass of one atom of nickel. 1 x 10-22 g Mole Conversions Review Name: ________________________ Date: ______________________ 1. Convert from moles to grams. a. 10.0 mol Cr __________________________________________________________ c. 2.20 x 103 mol Sn __________________________________________________________ e. 2.40 mol N2 __________________________________________________________ 2. Convert from grams to moles. a. 72.0 g Ar __________________________________________________________ c. 187 g Al __________________________________________________________ e. 7.21 x 102 g He __________________________________________________________ 3. Find the number of moles in each of the number of atoms or molecules. a. 1.20 x 1025 atoms of P __________________________________________________________ c. 4.81 x 1014 molecules of NH3 ____________________________________________________ 4. Find the number of atoms or molecules in each of the number of moles. a. 1.24 mol Cl2 __________________________________________________________ c. 34.02 mol Ca(OH)2 __________________________________________________________ 5. Convert the following. a. Find the number of molecules in 60.0 g of N2O. __________________________________________________________ e. Find the mass of one atom of nickel. __________________________________________________________ 6. 100 % hydrogen peroxide H2O2 has a density of 1.45 g/cm (not the type found in your medicine cabinet!) 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