CHM2045L Final

# CHM2045L Final - CHM2045L Final 136/120 points earnable (16...

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CHM2045L Final 136/120 points earnable (16 extra credit points) Earn 2 extra credit points for writing the formula for sodium carbonate: __________ 1. (6 points) To the nearest 0.1 drop, calculate the number of drops in one mL based on drop counts of 45 drops per 2.0 mL and 62 drops per 3.0 mL. 2. (6 points) A total volume of 10.10 mL is occupied by 7.25 g of a liquid and an unknown mass of an insoluble solid. If the density of the liquid is 0.870 g/mL and the density of the solid is 12.3 g/mL, what is the unknown mass of the solid? 3. (10 points) Based on experiment, tell how to reclaim the maximum amount of pure S 8 from a mixture of KNO 3 with S 8 .

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4. (10 points) If Mg 3 N 2 reacts with water to make Mg(OH 2 ) and ammonia, how many grams of ammonia can be produced from a reaction mixture of 0.260 mol Mg 3 N 2 and 1.80 g H 2 O? (FM in g/mol: Mg = 24.3, O = 16.0, N = 14.0, H = 1.01) 5. (8 points) If 35.0 mL of 0.613 M acetic acid is combined with 86.5 mL of 0.254 M NaOH, what is the maximum molar quantity of sodium acetate obtainable by
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## This note was uploaded on 04/10/2008 for the course CHM 2045L taught by Professor Horvath during the Fall '07 term at University of Florida.

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CHM2045L Final - CHM2045L Final 136/120 points earnable (16...

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