Answer:
P(total) = 164 mmHg
Explanation:
Given data:
Partial pressure of helium = 77 mmHg
Partial pressure of nitrogen = 87 mmHg
Total pressure of flask = ?
Solution:
According to Dalton law of partial pressure,
The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.
Mathematical expression:
P(total) = P₁ + P₂ + P₃+ ............+Pₙ
Now we will solve this problem by using this law.
P(total) = P(He) + P(N₂)
P(total) = 77 mmHg + 87 mmHg
P(total) = 164 mmHg
Answer:
156.7mL
Explanation:
First we need to find the number of mole of He. This can be achieved by doing the following:
Mass of He from the question = 30g
Molar Mass of He = 4g/mol
Number of mole = Mass /Molar Mass
Number of mole of He = 30/4
Number of mole of He = 7.5moles
Now, we can obtain the volume as follows:
P = 1.15 atm
T = 20°C = 20 + 273 = 293K
R = 0.082atm.L/Kmol
n = 7.5moles
V =?
Recall: PV = nRT
V = nRT/P
V = (7.5 x 0.082 x 293)/1.15
V = 156.7mL
Therefore, the volume that can be filled to that pressure is 156.7mL
Answer:
A computer's ability to perform so many calculations in a very short time affects how people communicate by stopping them from talking actually. We no longer talk verbally. We don't go out and socialize, we always talk from the phone or text. We have lost our inner touch with talking.
Explanation:
Answer:
Erosion is an important geologic _____ and a _____ force.
A. event; destructive
B. event; constructive
C. process; destructive
D. process; constructive
A geologic process causes changes to the physical makeup of a particular place and occurs _____.
A. slowly
B. quickly
C. internally only
D. externally only
Earthquakes and volcanoes are caused by _____ building up underground over time.
A. rocks
B. motions
C. stresses
D. deposits
Which of these is a constructive geologic process?
A. erosion
B. deposition
C. weathering
D. transportation
About fifty thousand years ago _____ formed Meteor Crater.
A. erosion
B. glaciation
C. an earthquake
D. an asteroid impact
Deposition is a _____.
A. destructive event
B. constructive event
C. destructive process
D. constructive process
Many geologic processes and events are due to _____.
A. erosion
B. deposition
C. weathering
D. plate tectonics
What can cause changes to the physical makeup of a particular place on Earth?
A. a geologic event only
B. a geologic process only
C. a geologic event or process
Which of these is NOT a geologic process?
A. erosion
B. glaciation
C. soil formation
D. volcanic eruption
An example of an internal geologic process would be _____.
A. deposition
B. an earthquake
C. plate movement
D. a volcanic eruption
Answer:
Separation by density
Explanation:
Mixtures are made up of two or more pure substances which tends to keep their individual identities. These components can be separated from each other by different physical techniques.
Mixtures are further classified as;
(i) Homogenous Mixture:
In this type of the mixtures the components are uniformly mixed and their properties as well as composition as uniform throughout. Such mixtures are also called as solutions.
The physical methods used to separate these components from each other are distillation (taking heat and pressure into account), Solvent extraction, Magnetic separation, Chromatography e.t.c.
(ii) Homogenous Mixture:
In this type of the mixtures the components are not uniformly mixed and their physical properties and composition are also not uniform.
The physical methods used to separate these components from each other are Filtration, Magnetic Separation, Centrifugation, Flotation e.t.c.
So, in given options the density can play role by settling the massive components of heterogenous mixture to sit at the bottom and separated