AP Chemistry U01 Daily Answers

Multiple Guess

1 D

2 C

3 B

4 A

5 C

6 B

7 B

8 B

9 C

10 D

11 B

12 A

13 B

14 B

15 A

16 A

17 A

18 B

19 A

20 D

21 B

Free Response

22. a. m/s

b. m/s²

c. m³

d. J/g ^. K(or J/k^oC)

e. g/mL(or g/cm³)

f. kg/m ^. s²

23. atto femto deci kilo mega tera exa

24. pico nano micro milli hector giga peta

25. a. means: student #1 = 19.190 g

student #2 = 15.416 g

student #3 = 13.780 g

b. standard deviations:

student #1 = 1.224 g

student #2 = 0.487 g

student #3 = 0.143 g

c. Student #2 is most accurate. Student #3 is most precise. Among the sources of error could be some spillage of the sample, an inaccurate balance or a wet beaker.

26. a. the agreement of a particular value with the true value

b. the degree of agreement among several measurements of the same quantity

c. an error that has an equal probability of being high or low

d. an error that always occurs in the same direction and is likely to have a procedural

cause

27. a.3

b. 4

c.4

d.1

e.7

28. 7.63 *10^-11 has 3 significant figures. 0.00076 only has 2.

29. a. 4*10⁷

b. 3.7*10⁷

c. 3.71*10⁷

d. 3.71000*10⁷

30. a. 20.04

b. 2.649*10⁵

c. 6*10^-26

d. -4*10⁵

31. a. 3.3 L

b. 3.3*10³mL

c. 3.3*10⁶ uL

d. 3.3*10³cm³

32. $0.30/liter

33. a. 16.8 miles

b. yes, roughly 63mph

34. $0.39/kg

35. hThere are 5.0*10⁴ joules of available energy in a bowl of Frosted Flakes

36. 41.9 m/s

37. a.35kg

b. 6*10³ L

38. 42^oC

39. a.61^oF

c.-18^oC

e. 228 K

40. 0.88g/mL

41. Yes weighing the pennies would work. If the volume of both groups is the same, any difference in mass must result from the density difference between the groups of pennies.

42. 440g

43. 1.1 g/mL

44.6.1 ug/uL

45. distillation, filtration, liquid-column chromatography, gas chromatography, paper chromatography.