Answer:
The answer to your question is -2855 J
Explanation:
Reaction
2C₂H₆ + 7O₂ ⇒ 4CO₂ + 6H₂O
Formula
Heat of reaction = ΔHrxn = ΣΔHrxn products - ΣΔHrxn reactants
Substitution
ΔHrxn = { 4(-393.5) + 6(-241.8)} - {2(-84.7) + 7(0)}
ΔHrxn = {-1574 -1450.8} - {-169.4}
ΔHrxn = -3024.8 + 169.4
ΔHrxn = -2855.4 J
Lithium forms a +1 ion because it loses one electron, making the ratio of electrons:protons unbalanced by losing one electron. the ratio is now 2e:3p.
Oxygen forms a -2 ion because of a different reason. It gains 2 electrons rather than losing them.
Answer:
![[HCl]_{eq}=0.05M](https://tex.z-dn.net/?f=%5BHCl%5D_%7Beq%7D%3D0.05M)
Explanation:
Hello,
In this case, for the given chemical reaction, the law of mass action at equilibrium results:
![Kc=\frac{[H_2]_{eq}[Cl_2]_{eq}}{[HCl]^2_{eq}}](https://tex.z-dn.net/?f=Kc%3D%5Cfrac%7B%5BH_2%5D_%7Beq%7D%5BCl_2%5D_%7Beq%7D%7D%7B%5BHCl%5D%5E2_%7Beq%7D%7D)
Next, in terms of the change 
due to reaction extent, it is rewritten, considering an initial concentration of HCl of 0.25M (1mol/4L), as:
Thus, solving for via quadratic equation or solver, the following results are obtained:
Clearly, the solution is 
as the other result will provide a negative concentration for the hydrochloric acid at equilibrium, thereby, its equilibrium concentration turns out:
![[HCl]_{eq}=0.25M-2*0.1M](https://tex.z-dn.net/?f=%5BHCl%5D_%7Beq%7D%3D0.25M-2%2A0.1M)
Best regards.
Hello,
Atomic number reflects the number of protons in the nucleus.
Hope this was helpful!
