FUND.OF CONSTRUCTION...-MINDTAP(2 TERM)
4th Edition
ISBN: 9781337552851
Author: Pratt
Publisher: CENGAGE L
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Chapter 4, Problem 6RQ
To determine
The description of the use of digitizers and explanation of the difference between the two main types of digitizers.
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Question 6:
Chlorine is widely used to purify municipal water supplies and to treat swimming pool
waters. Suppose that the volume of a particular sample of Cl₂ gas is 8.70 L at 895 torr
and 24°C.
(a) How many grams of Cl₂ are in the sample?
⚫ Atomic mass of CI = 35.453 g/mol
• Molar mass of Cl₂ = 2 x 35.453 = 70.906 g/mol
Solution:
Use the Ideal Gas Law:
Step 1: Convert Given Values
• Pressure: P = 895 torr → atm
PV=
= nRT
1
P = 895 ×
= 1.1789 atm
760
•
Temperature: Convert to Kelvin:
T24273.15 = 297.15 K
• Gas constant: R = 0.0821 L atm/mol. K
Volume: V = 8.70 L
Step 2: Solve for n
.
PV
n =
RT
n =
(1.1789)(8.70)
(0.0821)(297.15)
10.25
n =
= 0.420 mol
24.405
Step 3: Calculate Mass of Cl₂
Final Answer: 29.78 g of Cl₂.
mass nx M
mass=
(0.420)(70.906)
mass=
29.78 g
Please solve the highlighted question.
1. Design a PVC sanitary sewer collection system for the Village of Waffle (Figure P-17-24 B, shown below) by
preparing a sewer design table similar to that shown in Example 19-2 and a profile drawing similar
to Figure 19-13b B. You only need to show the calculations for the pipes running along Bacon Road and
Eggs Road, starting at point F and ending at Point B in the figure below. Your design should comply with the
requirements specified in Chapter 30 of the 10 States Standards for Wastewater. Use the following
assumptions:
0
о
о
Average daily flow rate is the same as average daily water demand, 9.2 m³/hr
Peaking factor for peak dry weather flow is 6.2
Peak wet weather flow is equal to the peak dry weather flow plus an assumption for infiltration and inflow
at 40 L/d-mm-km of pipe
DODO
on Ro
450 m
28 m
D.
150 m
Apartments
D
400 m
D
200 m
B
250 m
0
Dogs Road
ROOD625 m
-120 m
Syrup River
120 m
100-Year flood
Point
Elevation
Tank
137.0 m
A
130.0 m
B
122.0 m
C
122.3 m
D
122.6 m
A
D
300 m…
Chapter 4 Solutions
FUND.OF CONSTRUCTION...-MINDTAP(2 TERM)
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