Answer is: <span>D)194 kJ/mol, exothermic
</span>ΔHreaction = ∑(product bond energies) - ∑(reactant bond energies).
∑(product bond energies) = ΔHreaction + ∑(reactant bond energies).
ΔHreaction must be negative (exothermic) if ∑(product bond energies) is positive.
∑(product bond energies) = -1352 kJ/mol + <span>1546 kJ/mol.
</span>∑(product bond energies) = 194 kJ/mol.
∑ is summation.
If an electron moves up from the first orbit to the higher energy levels, energy will be absorbed by the electron itself and no emission line produced.
But if it moves from the orbits 6,5,4 and 3 to orbit 2, energy will be released by the electron and different emission lines wll be produced.
Answer:
hco I believe
Explanation:
Pretty sure about this, when do you need to put it in?
Answer:
![n_{O_2}=3.84molO_2](https://tex.z-dn.net/?f=n_%7BO_2%7D%3D3.84molO_2)
Explanation:
Hello!
In this case, since the combustion reaction of methanol is:
![CH_3OH+\frac{3}{2} O_2\rightarrow CO_2+2H_2O](https://tex.z-dn.net/?f=CH_3OH%2B%5Cfrac%7B3%7D%7B2%7D%20O_2%5Crightarrow%20CO_2%2B2H_2O)
In such a way, since there is 1:3/2 mole ratio between methanol and oxygen, we can compute the moles of oxygen that are needed to burn 2.56 moles of methanol as shown below:
![n_{O_2}=2.56molCH_3OH*\frac{\frac{3}{2}molO_2}{1molCH_3OH} \\\\n_{O_2}=3.84molO_2](https://tex.z-dn.net/?f=n_%7BO_2%7D%3D2.56molCH_3OH%2A%5Cfrac%7B%5Cfrac%7B3%7D%7B2%7DmolO_2%7D%7B1molCH_3OH%7D%20%5C%5C%5C%5Cn_%7BO_2%7D%3D3.84molO_2)
Best regards!
Answer:
ver explicacion
Explanation:
Los iones se forman cuando las especies químicas pierden o ganan electrones.
Las sustancias iónicas consisten en un ión positivo y negativo cuyas cargas se equilibran exactamente entre sí, por lo que el compuesto iónico es neutro.
Los átomos de metal se mantienen unidos por el enlace metálico. Esto implica la interacción entre iones metálicos cargados positivamente y un mar de electrones negativos. Las cargas positivas de los iones metálicos están exactamente equilibradas por el mar de electrones cargados negativamente, por lo que el metal es neutro.