Lab 4: Instrumentation and Techniques 26. H one mole of glucose? (1 ow many mole
ID: 151590 • Letter: L
Question
Lab 4: Instrumentation and Techniques 26. H one mole of glucose? (1 ow many molecules of glucose (C Hu0, molecular mass 180 daltons) would be present in points) a) 342 b) 23 X 104 c) 180 d) 6.02 X 10 e) 180 X 10 27. How many grams of acetc acid (C2HA02) would you use to make 10 L of a 0.1 M aqueous solution of acetic acid? (Note: The atomic masses, in daltons, are approximately 12 for carbon, 1 for hydrogen, and 16 for oxygen.) (1 % point) a) 60.0 b) 0.6 c) 6.0 d) 10.0 e) 0.1 28, One mole (mol) of a substance is (1 ½ points) a. the molecular mass of the substance expressed in grams b. 1 g of the substance dissolved in 1 L of solution c. the largest amount of the substance that can be dissolved in 1 L of solution d. 6.02 x 1023 molecules of the substance e. a and d only f. a, b, c and d 29. The molecular mass of glucose (CGH126) is 180 g. Which of the following procedures should a. Dissolve 0.5 g of glucose in 1 L of water. b. Dissolve 180 g of glucose in 1 L of water. c. Dissolve 90 g of glucose in a small volume of water, and then add more water until the total ou carry out to make a 0.5 M solution of glucose? (1 % points) volume of the solution is 1 L.Explanation / Answer
26) d) If the substance is molecular, number of molecules is equal to 6.023*10^23
27) a) The molar mass of CH3COOH is 12+3(1)+12+16+16+1 = 60.5g/mol
1 mole of CH3COOH is just 60.5 g
28) a and d
29) c. 90g . 0.5M*180g*1litre= 90g of glucose
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