University:
Augusta University
Course:
CHEM 1441 | General Chemistry
Academic year:

2022
Views:

294

Pages:

3
Author:

apallirasbnc4

Practicing the Mole - - Even Problems Answer Key Calculate the mass in grams of each of the following: 2. 8.00 moles of aluminum 8.00 mol 26.98 g = 216 g Al 1 mol 4. 2.00 x 102 moles of chlorine (Cl2) 6. 7.00 moles of iodine (I2) 7.00 mol 253.8 g = 1,780 g I2 1 mol 8. 9.20 moles of iron 9.20 mol 55.85 g 200. mol 70.90 g = 14,200 g Cl2 1 mol = 514 g Fe 1 mol Calculate the number of moles of atoms in each of the following: 10. 281 g of iron 281 g 1 mol 14. 93.0 g of phosphorus = 5.03 mol Fe 55.85 g 12. 72.0 g of magnesium 72.0 g 1 mol = 2.96 mol Mg 24.31 g 93.0 g 1 mol = 3.00 mol P 30.97 g 16. 1035 g of lead 1035 g 1 mol 207.2 g = 4.995 mol Pb Calculate the number of atoms in each of the following: 18. 5.40 moles of iron 5.40 mol 6.022 x 1023 atoms 20. 10.0 moles of titanium 10.0 mol 6.022 x 1023 atoms 1 mole = 3.25 x 10 24 atoms Fe 1 mole = 6.02 x 10 24 atoms Ti Calculate the number of moles of atoms in each of the following: 22. 9.03 x 1023 atoms of S 9.03 x 1023 atoms 1 mole 6.022 x 1023 atoms = 1.50 mol S 24. 1.204 x 1024 atoms of Na 1.204 x 1024 atoms 1 mole 6.022 x 1023 atoms = 1.999 mol Na Calculate the number of molecules in each of the following: 26. 24 grams of ozone (O3) 24 g 1 mole 48.0 g 6.022 x 1023 molecules 1 mole = 3.0 x 1023 molecules O3 28. 96 grams of sulfur (S8) 96 g 1 mole 6.022 x 1023 molecules 256.53 g 1 mole = 2.3 x 1023 molecules S8 Calculate the mass in grams of each of the following: 30. 12.0 moles of HCl 12.00 mol 36.45 g 1 mole 34. 40.0 moles of Na2CO3 40.00 mol 105.99 g = 437 g HCl 32. 7.50 moles of sugar (C12H22O11) 7.50 mol 342.34 g 1 mole = 2,570 g sugar 1 mole = 4,240 g Na2CO3 36. 8.20 moles of CaCO3 8.20 mol 100.09 g 1 mole = 821 g CaCO3 Calculate the number of moles in each of the following: 38. 2.70 x 103 grams of water (H2O) 2,700 g 1 mole 18.02 g 40. 3.00 kilograms of CaCO3 3,000 g 1 mole = 1.50 x 102 mol H2O 100.09 g = 30.0 mol CaCO3 Calculate the following: 42. moles in 512 grams of Al2O3 512 g 44. moles in 36.0 kilograms of CaS 1 mole 36,000 g 101.96 g 1 mole 72.15 g = 5.02 mol Al2O3 = 499 mol CaS Calculate the number of molecules in each of the following: 46. 5.00 moles of sugar (C12H22O11) 5.00 mol 6.022 x 1023 molecules = 3.01 x 1024 molecules sugar 1 mole 48. 27.0 grams of water (H2O) 27.0 g 1 mole 18.02 g 6.022 x 1023 molecules 1 mole = 9.02 x 1023 molecules H2O Calculate the mass in grams of each of the following: 50. 9.03 x 1023 molecules of hydrogen sulfide (H2S) 9.03 x 1023 molecules 1 mol 6.022 x 10 23 34.09 g molecules 1 mole = 51.1 g H2S 52. 1.204 x 1024 (12.04 x 1023) molecules of ammonia (NH3) 1.204 x 1024 molecules 1 mol 23 1 7.04 g 6.022 x 10 molecules 1 mole = 34.07 g NH3