Answer:
D. Are there any running shoes that help people run faster?
Explanation:
because it's the question that more seems scientific.
i hope this helps
Answer:
Since heat is released for
C
3
H
8
(
g
)
+
5
O
2
(
g
)
→
3
CO
2
(
g
)
+
4
H
2
O
(
g
)
+
2219.9
kJ
,
we say that
Δ
H
∘
C
=
−
2219.9 kJ/mol propane
. We approximate that this is the change in potential energy for the reactants going to the products.
https://www.khanacademy.org/
https://www.khanacademy.org/
The above is for an endothermic reaction.
A certain feature of combustion reactions suggests that you should draw the diagram DIFFERENTLY from what you see above. How should the energy of the products compare with that of the reactants for combustion reactions?
Answer:
Is used to predict the spectra of hydrogen and hydrogen like species
Explanation:
The Bohr's model of the atom was propounded by Neis Bohr. In his theory, an atom is composed of quantized energy levels in which electrons may be found.
The transition of an electron between energy levels leads to the absorption or emission of energy in the form of a photon of visible light. The energy absorbed or emitted depends on the energy difference between the two energy levels.
The model is successful at predicting the electronic spectra of one electron species but totally fails when the specie has more than one electron. Also, the model fails to show the true shape of the electron orbitals within an atom.
