Answer : The
for the combustion of naphthalene is 
Solution : Given,
Mass of naphthalene = 1.025 g
Initial temperature = 
Final temperature = 
Specific heat capacity of calorimeter = 
Molar mass of naphthalene = 128 g/mole
First, we have to calculate the heat absorbed, 
Formula used :

Now put all the given values in this formula, we get

Now we have to calculate the moles of naphthalene.
Moles of
= 
Now we have to calculate the
for combustion of naphthalene.

where,
q = heat absorbed
n = number of moles
Now put all the values in this formula, we get

Therefore, the
for the combustion of naphthalene is 
Answer:
Applying this same method to the carbonate ion, we have 3 resonance structures with bond orders of 2, 1, 1 when considering the bond between carbon and a single oxygen.
Explanation:
CO32- has three resonating structures. The way to calculate the bond order for most conpounds having resonating structures is:(No.of bonds/No.of resonating structures) Since, CO32- has 4 bonds, Thus answer will be 4/3 or 1.3333..
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