Residential Construction Academy: House Wiring (MindTap Course List)
5th Edition
ISBN: 9781337402415
Author: Gregory W Fletcher
Publisher: Cengage Learning
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Chapter 9, Problem 12RQ
A wall-mounted luminaire (fixture) weighing not more than_________ pounds is permitted to be supported on a device box provided the luminaire or its supporting yoke is secured to the box with no fewer than two 6-32 or Larger screws. Name the
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Determine the minimum length of a sag vertical curve if the grades are –3% and +4%. The design speed is 75 mi/h. State all assumptions used. Make sure to consider the following criteria: stopping sight distance, comfort, and general appearance
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.
Chapter 9 Solutions
Residential Construction Academy: House Wiring (MindTap Course List)
Ch. 9 - Prob. 1RQCh. 9 - Prob. 2RQCh. 9 - Prob. 3RQCh. 9 - The minimum amount of free conductor required at...Ch. 9 - Prob. 5RQCh. 9 - Describe how an insulated grounded conduct or...Ch. 9 - Describe how a white Insulated conductor in a...Ch. 9 - Prob. 8RQCh. 9 - Describe how a conductor that is larger than 6 AWG...Ch. 9 - Prob. 10RQ
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