A sample of NH 4 HS ( s ) is placed in a 2.58L flask containing 0.100 mol NH 2 ( g ) . What will be the total gas pressure when equilibrium is established at 25 ° C ? NH 4 HS ( s ) ⇌ NH 3 ( g ) +H 2 S ( g ) K p = 0.108 at 25 ° C(for pressure in atmospheres)
A sample of NH 4 HS ( s ) is placed in a 2.58L flask containing 0.100 mol NH 2 ( g ) . What will be the total gas pressure when equilibrium is established at 25 ° C ? NH 4 HS ( s ) ⇌ NH 3 ( g ) +H 2 S ( g ) K p = 0.108 at 25 ° C(for pressure in atmospheres)
Solution Summary: The author explains that the total pressure when equilibrium is established at 25°C is 1.154 atm.
A sample of
NH
4
HS
(
s
)
is placed in a 2.58L flask containing 0.100 mol
NH
2
(
g
)
. What will be the total gas pressure when equilibrium is established at
25
°
C
?
NH
4
HS
(
s
)
⇌
NH
3
(
g
)
+H
2
S
(
g
)
K
p
=
0.108
at
25
°
C(for pressure in atmospheres)
In the video, we looked at the absorbance of a certain substance and how it varies
depending on what wavelength of light we are looking at. Below is a similar scan of a
different substance. What color BEST describes how this substance will appear?
Absorbance (AU)
Violet
Blue
Green
Orange
1.2
1.0-
0.8-
0.6-
0.4-
0.2
0.0
450
500
550
600
650
700
Wavelength (nm)
violet
indigo
blue
green
yellow orange
red
Red
O Cannot tell from this information
In the above graph, what causes -450 nm wavelength of light to have a higher
absorbance than light with a -550 nm wavelength? Check all that are true.
The distance the light travels is different
The different data points are for different substances
The concentration is different at different times in the experiment
Epsilon (molar absortivity) is different at different wavelengths
5. a. Data were collected for Trial 1 to determine the molar mass of a nonvolatile solid solute when dissolved in cyclo-
hexane. Complete the table for the analysis (See Report Sheet). Record calculated values with the correct number
of significant figures.
B. Freezing Point of Cyclohexane plus
Calculation Zone
Unknown Solute
2. Mass of cyclohexane (g)
10.14
Part C.4
3. Mass of added solute (g)
0.255
C. Calculations
1. k; for cyclohexane (°C⚫ kg/mol)
20.0
2. Freezing point change, AT, (°C)
3.04
Part C.6
3. Mass of cyclohexane in solution (kg)
4. Moles of solute, total (mol)
Show calculation.
5. Mass of solute in solution, total (g)
6. Molar mass of solute (g/mol)
Show calculation.
Chapter 15 Solutions
General Chemistry: Principles And Modern Applications Plus Mastering Chemistry With Pearson Etext -- Access Card Package (11th Edition)
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