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Unformatted text preview: 23 things) = 1 B. Molar mass Atomic Mass Sulfur (32.06 grams / 1 mole) or (1 mole / 32.06 grams) Molecular Mass CO 2 (44.01 grams / 1 mole) or (1 mole / 44.01 grams) Formula Mass NaCl (58.44 grams / 1 mole) or (1 mole / 58.44 grams) C. Concentration of a solution For a 0.55 molar sodium chloride solution = 0.55 M NaCl, you can write: (0.55 mole NaCl / 1 L solution) or (1 L solution / 0.55 mole NaCl) The ratio you choose depends upon the unit you want to end up in. The unit you want always goes on top (numerator). The unit you are converting from always goes on the bottom (denominator). For example if you want to convert from molecules of CO 2 to moles of CO 2 you would multiply: molecules of CO 2 1 mole CO 2 = moles CO 2 (number) (unit) 6.02 x 10 23 molecules CO 2 (number) (unit) Note that the units molecules CO 2 "cancel out", (molecules CO 2 / molecules CO 2 ) = 1, and you are left in units of moles CO 2 ....
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This note was uploaded on 02/10/2009 for the course CHEMISTRY 105 taught by Professor Brozak during the Spring '09 term at Washington State University .
- Spring '09