Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
HONORS CHEMISTRY - CHAPTER 10 NAME: CHEMICAL QUANTITIES DATE: MOLAR MASS CALC WKST - SELECTED ANSWERS - V6 PAGE: Directions: Write the correct formula for the following chemical compounds and determine the molar mass for each compound to three significant figures. To receive credit for this assignment, you must show all work on a separate piece of paper. Circle your answer. Note that the units for all answers may be in atomic mass units (amu) per atom, ion, molecule, or formula unit. Likewise, the units for all answers may also be in grams (g) per mole of atoms, ions, molecules, or formula units. Kudos to Mrs. Doyle for creating this worksheet. Chemical Name Chemical Formula Calculations ⎛ ⎞ gK (1 mol K ) ⎜⎝ 39.1 mol K ⎟⎠ = 39.1 g K ⎛ 54.9 g Mn ⎞ + 1 mol Mn ⎜ = 54.9 g Mn ⎝ mol Mn ⎟⎠ ( 1. potassium permanganate KMnO4 ) ⎛ 16.0 g O ⎞ + 4 mol O ⎜ = 64.0 g O ⎝ mol O ⎟⎠ ( ) Total Mass = 158.0 g Final Mass = 158 g ⎛ ⎞ g Al ( 2 mol Al ) ⎜⎝ 27.0 mol Al ⎟⎠ = 54.0 g Al ⎛ 32.1 g S ⎞ + 3 mol S ⎜ = 96.3 g S ⎝ mol S ⎟⎠ ( 3. aluminum sulfate Al2(SO4)3 ) ⎛ 16.0 g O ⎞ + 12 mol O ⎜ = 192 g O ⎝ mol O ⎟⎠ ( ) Total Mass = 342.3 g Final Mass = 342 g 1 Chemical Name Chemical Formula Calculations ⎛ ⎞ g Zn (1 mol Zn ) ⎜⎝ 65.4 mol Zn ⎟⎠ = 65.4 g Zn ⎛ 12.0 g C ⎞ + 4 mol C ⎜ = 48.0 g C ⎝ mol C ⎟⎠ ( ) ⎛ 1.01 g H ⎞ + 6 mol H ⎜ = 6.06 g H ⎝ mol H ⎟⎠ ( 5. zinc acetate dihydrate Zn(C2H3O2)2 · 2Η2Ο ) ⎛ 16.0 g O ⎞ + 4 mol O ⎜ = 64.0 g O ⎝ mol O ⎟⎠ ( ) ⎛ 1.01 g H ⎞ + 4 mol H ⎜ = 4.04 g H ⎝ mol H ⎟⎠ ( ) ⎛ 16.0 g O ⎞ + 2 mol O ⎜ = 32.0 g O ⎝ mol O ⎟⎠ ( ) Total Mass = 219.5 g Final Mass = 220. g (2 ⎛ 1.01 g H ⎞ mol H ⎜ = 2.02 g H ⎝ mol H ⎟⎠ ) ⎛ 12.0 g C ⎞ + 1 mol C ⎜ = 12.0 g C ⎝ mol C ⎟⎠ ( 7. carbonic acid H2CO3 ) ⎛ 16.0 g O ⎞ + 3 mol O ⎜ = 48.0 g O ⎝ mol O ⎟⎠ ( ) Total Mass = 62.02 g Final Mass = 62.0 g 2 - HC - Chapter 10 - Molar Mass Calculations - Selected Answers - V6 Chemical Name Chemical Formula Calculations ⎛ ⎞ g Cu (1 mol Cu ) ⎜⎝ 63.6 mol Cu ⎟⎠ 9. copper (II) oxide CuO = 63.6 g Cu ⎛ 16.0 g O ⎞ + 1 mol O ⎜ = 16.0 g O ⎝ mol O ⎟⎠ ( ) Total Mass = 79.6 g Final Mass = 79.6 g 3 - HC - Chapter 10 - Molar Mass Calculations - Selected Answers - V6