Answer:
energy = 391.902 kJ /mol
Explanation:
given data
wavelength = 305 nm = 305 ×
m
to find out
average energy
solution
we know speed of light is 3 ×
m/s
so we find frequency here first by speed of light formyla
speed = wavelength × frequency
3 ×
= 305 ×
× frequency
frequency = 9.8360 ×
so energy is
energy = hf
here h = 6.62 ×
J-s
so
energy = 6.62 ×
× 9.8360 ×![10^{14}](https://tex.z-dn.net/?f=10%5E%7B14%7D)
energy = 6.51 ×
J
so
energy = 6.51 ×
×
kJ/mol
energy = 391.902 kJ /mol
<span>Yes it is possible to distiguish between an element and a compound. An element is any one of the over 100 things you can see on the periodic table. like say .F or H. Those are element. Another example C or O. when you put CO together you would get Carbon monoxide and that would be an element. Just know that if you see one of the symbols just as how they would look on the periodic table then it is not a compound. It has to be with another element</span>
The stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m.
<h3>What is kinetic energy?</h3>
Kinetic energy is the energy of a body possessed due to motion.
This means that for an object to possess kinetic energy, it must be in motion.
The kinetic energy is measured in Joules, which is a product of the mass of the substance and the time taken to travel a distance.
A stopwatch is an instrument used to measure time as one of the components of kinetic energy.
Therefore, the stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m.
Learn more about kinetic energy at: brainly.com/question/12669551
Answer:
The image of everything in front of the mirror is reflected backward, retracing the path it traveled to get there. Nothing is switching left to right or up-down. Instead, it's being inverted front to back. ... That reflection represents the photons of light, bouncing back in the same direction from which they came
Explanation: