is the correct statement that describes the particles of an ideal gas on the basis of kinetic molecular theory.
Further Explanation:
Kinetic theory of gases
It defines gas to be considered as a large number of particles. These particles move randomly in all directions. It explains the macroscopic properties of gases by considering their molecular composition and motion.
Postulates:
(a) The gas molecules are very small and are located far apart from each other. Most of the volume occupied by the gas is an empty space.
(b). The molecules of the gas are in rapid random motion. These can move in all directions.
(c). The gas molecules undergo collisions with each other and with the walls of the container. The collisions between molecules and container walls are responsible for the pressure of the gas.
(d). There is no loss of kinetic energy when gas molecules collide so their collisions are known as perfectly elastic.
(e). No interaction occurs between different gas particles during collisions.
(1) The gas particles are relatively far apart and have negligible volume.
The size of gas particles is very small and therefore these have negligible volume. Moreover, these molecules are far away from each other.
(2) The gas particles are in constant, nonlinear motion.
The motion of the gas particles occurs randomly in all directions so they can not be in constant, nonlinear motion.
(3) The gas particles have attractive forces between them.
The particles of gas have no interaction with each other. So no attractive forces are present between them.
(4) The gas particles have collisions without transferring energy.
The collisions of gas molecules are considered to be perfectly elastic. So the total energy of the system remains constant. It neither increases nor decreases.
Therefore the correct statement is (1).
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Answer details:
Grade: High School
Subject: Chemistry
Chapter: Ideal gas equation
Keywords: kinetic theory of gases, collisions, energy, constant, attractive forces, particles, molecules, volume, random motion, perfectly elastic, negligible.
Answer:
(1) The gas particles are relatively far apart and have negligible volume
Explanation:
The Kinetic Molecular Theory was formulated to explain the behaviour of ideal gases. The main postulates of the theory are:
-The volume occupied by the gases is negligible when compared to the distance between them
- They do not experience any intermolecular forces of attraction or repulsion
-The collision between gas particles is completely elastic
-The gas particles are in constant random motion
Therefore the first statement which suggests that the gas particles are relatively far apart and have negligible volume is in accordance with the theory
(2) crystallization (4) transmutation
The spontaneous decay of an atom is known as transmutation.
• The conversion of one chemical element or an isotope into another chemical element is termed as nuclear transmutation.
• It takes place in any process where the number of neutrons or protons in the nucleus of an atom is changed.
• It is the spontaneous decay of an atom.
• Transmutation can be attained either by radioactive decay or by nuclear reactions. In radioactive decay no external cause is required, while in nuclear reactions an external particle reacts with a nucleus.
• One kind of natural transmutation is witnessed when some kind of radioactive elements found in nature spontaneously decay by a procedure that leads to transmutation like beta or alpha decay.
Thus, the correct answer is option 4, that is, transmutation.
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B) BaI2
C) PCl3
D) CS2
Percentage % yield = 91.8%
Given:
20 g NaCl
45 g AgCl
To find:
% yield=?
The balanced chemical equation will be:
NaCl + AgNO₃ ⇒ AgCl + NaNO₃
First, we need to calculate moles of NaCl.
Then, calculate moles of AgCl from equation:
Mass AgCl(theoretical) :
Now, calculate for percentage yield.
The percentage yield will be 91.8%.
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%yield = 91.8
Given
20 g NaCl
45 g AgCl
Required
%yield
Solution
Reaction
NaCl + AgNO₃ ⇒ AgCl + NaNO₃
mol NaCl :
= mass : MW
= 20 g : 58,44 g/mol
= 0.342
mol AgCl from equation :
= 1/1 x mol NaCl
= 1/1 x 0.342
= 0.342
Mass AgCl(theoretical) :
= mol x MW
= 0.342 x 143,32 g/mol
= 49.02 g
%yield = (actual/theoretical) x 100%
%yield = (45/49.02) x 100%
%yield = 91.8
Answer:
Crushing or grinding increases the surface area of the salt that is exposed to the molecules of water. Stirring increases the speed at which the particles of salt come in contact with the water molecules.