1. Based on the results of Experiment 3, the pH of a 2.5% nitric acid solution had the lower pH. By mass formic acid solution at 25°C would most likely have been closest to which of the following?
2. According to Figures 1 and 2, as the temperature increased from 20°C through 27°C, on average, did the duration of the adult stage increase or decrease, and did the number of eggs produced per female per day increase or decrease?
3. Based on Figure 1, at 26°C, the nymph stage would most likely last:
4. Based on Figure 2, at a temperature of 25°C, an adult female B.argentifolii will produce, on average, a total of how many eggs over the first 7 days of her adult stage?
5. Based on Figure 2, the average number of eggs produced per female per day was how many times as great at 35°C as it was at 20°C?
6. According to Table 1, among the 5 PAs, as the molecular mass increases, the BP at 101.3 kPa: which of the following?
7. According to Tables 1 and 2, the PA that has a flash point of −1°C at 101.3 kPa has a molecular mass of:
8. Based on Table 2, the vapor pressure of 1-pentanamine at 11°C would most likely be:
9. Consider the PA ethanamine, CH3CH2NH2. Based on Table 1, the molecular mass of ethanamine is closest to
10. Consider the PA 1-octanamine, CH3(CH2)7NH2. Based on Tables 1 and 2, the temperature at which the vapor pressure of 1-octanamine equals 100 kPa would most likely be:
11. Which of the PAs listed in Table 1 would exist in the liquid state at −65°C and 101.3 kPa?
12. Based on the results of the studies, which of the sorbents would be most effective in cleaning up an ocean spill of heavy crude oil, and which of the sorbents would be most effective in cleaning up an ocean spill of light crude oil?
13. Which procedure was most likely intended to simulate the effect of waves in the ocean?
14. Consider the results of both studies for an oil mass of 30g. Which of the sorbents soaked up a greater mass of light crude oil than of heavy crude oil at that oil mass?
15. In each study, after heavy crude oil or light crude oil was added to a beaker of seawater, the oil floated on the surface of the seawater. This information is consistent with which of the following statements comparing the density of seawater with the density of heavy crude oil and with the density of light crude oil?
16. According to the results of Study 2, in the beakers containing 20 g or more of light crude oil in seawater, did 1 g of any of the natural sorbents soak up more oil than did 1 g of synthetic sorbent?
17. Consider the statement 'As the mass of oil added to 500mL of seawater increased, the mass of oil soaked up by 1 g of sorbent always increased.' Is this statement consistent with the results of Study 1 for which of the sorbents?
18. Suppose that, in Study 1, 0.5 g of dry cotton and 0.5 g of dry polypropylene had been thoroughly mixed and then added to a 1 L beaker containing 500 mL of seawater and 50 g of heavy crude oil. The number of grams of oil soaked up by the 1 g sorbent mixture would most likely have been:
19. Based on the results of Experiment 2, if 6 drops of methyl violet are added to a 5% by mass nitric acid solution, what will be the color of the resulting solution at 25°C?
20. Based on the results of Experiment 1, for each of the 4 acids, as acid concentration increased from 10% by mass through 50% by mass, the surface tension at 25°C:
21. A student predicted that, if a formic acid solution and an acetic acid solution have the same acid concentration by mass and are both at 25°C, the formic acid solution has a greater surface tension than does the acetic acid solution. The results of which experiment better support or refute this prediction?
22. Suppose that 6 drops of methyl violet are added to an aqueous solution of an acid with a pH of 2.5 at 25°C. Based on the results of Experiments 2 and 3, the color of the resulting solution at 25°C will most likely be:
23. For the studies to be performed as described, which of the following criteria must have been satisfied during any given trial?
24. In how many studies was the concrete beam tested, and in how many studies, if any, was only the concrete beam tested?
25. Suppose that in Study 3 the 2 beams had been tested in the H configuration. How would the results most likely have compared with the data shown in Figure 3?
26. Can it be determined on the basis of Study 2 whether the maximum deflection of the steel beam depended on the strength of the applied force?
27. Suppose that a doorway is to be supported by one of the two beams tested in the studies. Which beam, when oriented in which configuration, CANNOT be used to support this doorway?
28. Based on Student 3’s predictions, which of the variables listed below does NOT affect f?
29. According to the predictions of Student 1 and Student 2, respectively, as cube mass increases, does the cube’s average speed during a cycle increase or decrease?
30. Based on Student 2’s predictions, which of the changes listed below would cause f to decrease?
31. Based on Student 1’s predictions, as k increases, the cube’s average kinetic energy will:
32. Suppose that M = 1 kg for Cube R and that M = 2 kg for Cube S. Based on Student 3’s predictions, for given values of k and A, the average acceleration will be greater for which cube?
33. Consider 2 springs, Spring X and Spring Y. Spring X has a smaller k than does Spring Y. Student 1 would probably agree that the cube will take a longer time to complete a cycle if it is attached to which spring?
34. Based on the information given, what total distance will the cube travel during one complete cycle?