Answer:
Carbon dioxide is a gas at room temperature
Answer:
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below.
Explanation:
Properties of matter can be broadly classified into two categories:
-Physical properties, these usually involve a change in the state of matter
-Chemical properties. these involve a change in the chemical composition of matter.
Now, physical properties can be further classified as:
Extensive: these depend on the amount of the substance, eg: mass, volume
Intensive: these do not depend on the amount of the substance eg: density, color, melting point, boiling point
A physical property that does not describe a change in state is color. For example: copper sulfate is a compound which is a blue in color. Thus, color provides information which describes the appearance of matter. In contrast, properties like melting or boiling point suggests a change in the state of the substance.
Answer : The kinetic energy will be 24 J.
Explanation : Given,
Mass of marble = 3 kg
Velocity of a marble = 4 m/s
Formula used to calculate the kinetic energy is:
where,
K.E = kinetic energy
m = mass
v = velocity
Now putting all the given values in this formula, we get:
Therefore, the kinetic energy will be 24 J.
Answer:
Explanation:
Consider that, as the system is adiabatic, 
where U1 and U2 are the internal energies before the process and after that respectively.
Consider that: 
, and that the internal energy of the first state is the sum of the internal energy of each tank.
So, 
Where A y B are the tanks. The enthalpy for an ideal gas is only function of the temperature, as the internal energy is too; so it is possible to assume: 
So, 
Isolating 
,
So,
