An energy profile of a reaction tells you whether it's endothermic or exothermic, the energy of the products and reactants, the activation energy needed for the forward (Ea) and reverse (Ea') reactions, the change in energy (∆E), and the energy of the activated complex.
Answer:
Equation correctly showing the heat of solution
Explanation:
Mass of aqueous solution = m = 100 g
Specific heat of solution = c = 4.18 J/gºC
Change in temperature = 
ΔT = 21.6ºC - 30.0ºC = -8.4ºC
Heat lost by the solution = Q
Q = -3,511.2 J ≈ -3.51 kJ
Heat absorbed by potassium nitrate when solution in formed; Q'
Q' = -Q = 3.51 kJ
Moles of potassium nitrate , n= 
The heat of solution =
So, the equation correctly showing the heat of solution
Answer:
I'd say ALL OF THE ABOVE.
A Mechanical wave is a disturbance that transfers energy as it moves through a medium without displacement of the medium itself.
It can Either be Transversal or Longitudinal.
It is Transversal when the particles of the medium move perpendicular to the wave motion.
It requires a medium and begin at a source with a disturbance
So
ALL THE OPTIONS SEEM LEGIT.
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Protons and neutrons are in the center of the atom, making up the nucleus. Electrons surround the nucleus. Protons have a positive charge.
Each element has a specific mass number and a specific atomic number. These two numbers are fixed for an element. The mass number tells us the number (the sum of nucleons) of protons and neutrons in the nucleus of an atom. it has mass number 235 , it means that the sum of neutrons and protons in a carbon atom is 235.3
