Chapter 3: Q 44E (page 170)
44. Explain what changes and what stays the same when 1.00 L of a solution of NaCl is diluted to 1.80 L.
Molarity and volume of solution changes,
Moles of solute remains same.
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Question: If 0.1718L of a 0.3556-M C3H7OH solution is diluted to a concentration of 0.1222M, what is the volume of the resulting solution?
Question- Polymers are large molecules composed of simple units repeated many times. Thus, they often have relatively simple empirical formulas. Calculate the empirical formula of the following polymers:
(a) Lucite (Plexiglas); 59.9%C, 8.06%H, 32.0% O
(b) Saran 24.8%C, 2.0%H, 73.1%Cl
(c) Polyethylene 86%C, 14%H
(d) Polystyrene 92.3%C, 7.7%H
(e) Orlon 67.9%C, 5.70%H, 26.4%N
Determine the number of moles of compound and the number of moles of each type of atom in each of the following:
(a) 25.0 g of propylene, C3H6
(b) 3.06×10−3 g of the amino acid glycine, C2H5NO2
(c) 25 lb of the herbicide Treflan, C13H16N2O4F (1 lb = 454 g)
(d) 0.125 kg of the insecticide Paris Green, Cu4(AsO3)2(CH3CO2)2
(e) 325 mg of aspirin, C6H4(CO2H) (CO2CH3)
Question: Consider this question: What is the molarity of HCl if 35.23ml of a solution of HCl contain 0.3366g of HCl?
(a) Outline the steps necessary to answer the question.
(b) Answer the question.
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