At conditions 50 K and 20 kPa of temperature and pressure
would helium behave most like an ideal gas. The answer is number 1. This is because
the temperature is so low and the pressure is low too.
Answer:
D Earth's hot interior
Explanation:
The internal heat engine of the earth is the energy source that powers plate movement.
The sun drives the surface process and provides energy for the external heat engine
- The earth's interior sources it heat from:
- decays of radioactive isotopes
- remnant heat from the formation of the earth
- frictional heating from the movement of the earth
Therefore, the heat is used to melt rocks and set up convection currents that drives plate movements.
Explanation:
Formula used for the radius of the orbit will be,
(in pm)
where,
= energy of orbit
= radius of orbit
n = number of orbit
Z = atomic number
a) The Bohr radius of an electron in the n = 3 orbit of a hydrogen atom.
Z = 1
476.1 pm is the Bohr radius of an electron in the n = 3 orbit of a hydrogen atom.
b) The energy (in J) of the atom in part (a)
is the energy of n = 3 orbit of a hydrogen atom.
c) The energy of an Li²⁺ ion when its electron is in the n = 3 orbit.
n = 3, Z = 3
is the energy of an Li²⁺ ion when its electron is in the n = 3 orbit.
d) The difference in answers is due to change value of Z in the formula which is am atomic number of the element..
Distillation is the process of separating homogeneous mixtures -and a solution is a homogenous mixture, so this is the correct answer!
A homoogeneous mixture is a mixture in which the elements are mixed so well, that the mixture has a similar composition in all its parts. A heat can be applied to this mixture then to separate the parts - this is destination!