280 ❯ STEP 5. Build Your Test-Taking Confidence
- 1.27—Logarithmic growth takes place during
the time where the slope is the greatest, approxi-
mately between 12 and 30 hours. During that
time (18 hours), the bacterial population started
at 10 million and increased to 33 million (a dif-
ference of 23 million). Therefore, 23 million
divided by 18 hours gives a rate of 1.27 million
bacteria per hour. - –0.24—The solute potential is –(1) ×(0.1 M) ×
(0.00831 MPa/mole K) ×(293 K) =–0.24 MPa.
The pressure potential is zero because the solu-
tion is in an open container. Therefore (–0.24) +
0 =–0.24 MPa.
5. 2.4
SA= 6 ×(2.5 cm ×2.5 cm) =37.5 cm^2
V=(2.5 cm)^3 =15.6 cm^3
SA/V=37.5/15.6=2.46. 50
(0.5 M)(Vi)=(0.1 M)(250 mL)
Vi=50 mL− / / /1 2 3 4 5 6 7 8 90 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
07211 2 3 4 5 6 7 8 9− / / /1 2 3 4 5 6 7 8 90 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
0− 421 2 3 4 5 6 7 8 9− / / /1 2 3 4 5 6 7 8 90 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
0421 2 3 4 5 6 7 8 9− / / /1 2 3 4 5 6 7 8 90 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
0051 2 3 4 5 6 7 8 9