Answer:
Line 3 is incorrect
Explanation:
In line 3, the statements should be switched. Chemical reactions involve small amounts of energy and nuclear reactions involve enourmous amounts of energy. Lines 1 and 2 are correct.
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Radio waves infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation. Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.
We can apply Newton's third law of motion in roller coaster.
Explanation:
- If we are planning to make a roller coaster with elevations and turn then we need to apply newton’s law of motions, kinetic energy and potential energy.
- Newton’s third law of motion says that “ for every action, there is an equal and opposite reaction”. Newton’s third law of motion applies between the tract and ride vehicles.
- If we neglect the air resistance and friction, Roller coaster car will always experience two types of forces which are gravitational force and normal force. The normal force is acting perpendicular to the track and gravitational for is also acting downwards.
- Whenever the tracts get moving the gravitational force is attracting roller coaster to downward. So this will get accelerates. In the majority of the roller coasters, the hill will decrease with height as the train moves along the tract.
It's called a nebula or nebulae (plural). They are not only massive clouds of dust, hydrogen and helium gas, and plasma; they are also often “stellar nurseries” – i.e. the place where stars are born.
Answer: 
Explanation: The given chemical reaction is:
Equilibrium constant (Kc) in general is written as:
![K_c=\frac{[products]}{[reactants]}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5Bproducts%5D%7D%7B%5Breactants%5D%7D)
Note:- Coefficients are written as their powers
So, the Kc expression for the above reaction will be:
![K_c=\frac{[NO]^2[Br_2]}{[NOBr]^2}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5BNO%5D%5E2%5BBr_2%5D%7D%7B%5BNOBr%5D%5E2%7D)
Equilibrium moles are given for all of them. Let's divide the moles by given liters to get the concentrations.
![[NOBr]=\frac{0.412mol}{10.3L}](https://tex.z-dn.net/?f=%5BNOBr%5D%3D%5Cfrac%7B0.412mol%7D%7B10.3L%7D)
= 0.040 M
![[NO]=\frac{0.678mol}{10.3L}](https://tex.z-dn.net/?f=%5BNO%5D%3D%5Cfrac%7B0.678mol%7D%7B10.3L%7D)
= 0.0658 M
![[Br_2]=\frac{0.224mol}{10.3L}](https://tex.z-dn.net/?f=%5BBr_2%5D%3D%5Cfrac%7B0.224mol%7D%7B10.3L%7D)
= 0.0217 M
Plug in the values in the equilibrium expression to calculate Kc.
