Cornea - lens - retina
Explanation:
The pathway of light into the eyes goes from the cornea through the lens where it gets focus on the retina and optic nerves picks up the signal where the brain interprets the image. The eye is the organ of sight.
- When light rays from objects hits the human eye, it goes through the cornea first. In the cornea the image begins to form and using the pupil located in it the amount of light that enters is regulated.
- From the cornea, light goes into the lens. The lens allows for the rays to focus on the retina.
- The retina receives the rays and the image forms .
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Answer:
ΔS°reaction = 100.9 J K⁻¹ (mol C₃H₈)⁻¹
Explanation:
The equation for the reaction is given as;
C₃H₈(g) + 5O₂(g) → 4H₂O(g) + 3CO₂(g)
In order to determine the entropy change, we have to use the entropy valuues for the species in the reaction. This is given as;
S°[C₃H₈(g)] = 269.9 J K⁻¹ mol⁻¹
S°[O₂(g)] = 205.1 J K⁻¹ mol⁻¹
S°[H₂O(g)] = 188.8 J K⁻¹ mol⁻¹
S°[CO₂(g)] = 213.7 J K⁻¹ mol⁻¹
The unit of entropy is J K⁻¹ mol⁻¹
Entropy change for the reaction is given as;
ΔS°reaction = ΔS°product - ΔS°reactant
ΔS°reaction = [(4 * 188.8) + (3 * 213.7)] - [269.9 + (5 * 205.1)]
ΔS°reaction = 100.9 J K⁻¹ (mol C₃H₈)⁻¹
The fourth period, or fourth row, of the periodic table contains the elements from Z = 19 (potassium) to Z = 36 (kripton).
The abbreviated electron configuratin of potassium is K = [Ar] 4s.
Where [Ar] is 1s2 2s2 2p6 3s2 3p6.
The next element, Calcium, Z = 20, has electron configuration Ca = [Ar] 4s2.
Starting the next element, Scandium, Z = 21, the atoms start to fill the 3d orbitals. Scandium has electron configuration Sc = [Ar] 4s2 3d.
The 3d orbitals permit to accomodate 10 electrons. So, the filling of 3d orbitals end with the element Z = 30, wich is zinc. The electron configuration of zinc is Zn =[Ar] 4s2 3d10.
So, starting with the element Z = 31 (gallium) until Z = 36, this is 6 elements, will fill the 4p orbitals.Those are Ga, Ge, As, Se, Br and Kr.
The answer is that six elements in the fourth period of the periodic table have one or more 4p electrons. You can find those elements in the right side of the period and are from 13 group to 18 group.
It's just asking for 5% or 31 grams
Answer:
Energy in the United States comes mostly from fossil fuels: in 2010, data showed that 25% of the nation's energy originates from petroleum, 22% from coal, and 22% from natural gas.
Explanation:
It is really self explanitory
