A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow
Answer:

Explanation:
As we know that entropy change for phase conversion is given as

Here we know that heat required to change the phase of the water is given as

here we have

L = 2250000 J/kg
now we have


also we know that temperature is approximately same as boiling temperature
so we have

so here we have


The correct answer is (d), electrons are in probable cloud location.
An atom is made up of three fundamental particles, electron, proton and neutron. Proton and neutron are located in the nucleus, while the electrons orbit the nucleus in relative large orbit, however the exact position of the electron in the shall is highly unpredictable, therefore they are assumed to be in probable cloud location where the probability of finding an electron is very high.
-- Speed = (distance) / (time to cover the distance) = 840/2.5 = 336 m/s
-- Frequency = (speed) / (wavelength) = 336/0.70 = 480 Hz.
The work done by a force when moving an object is given by:

where W is the work, F is the force and d the displacement of the object.
Therefore, using

and

, we get a total work of