Estimate the surface-to-volume ratio of a c60 fullerene by treating the molecule as a hollow sphere and using 77pm for the atomic radius of carbon.

The surface-to-volume ratio of a C-60 fullerene is 3:77.

Explanation:

Surface area of sphere =

Volume of the sphere =

where : r  = radius of the sphere

Radius of the C-60 fullerene sphere = r = 77 pm

Surface area of the C-60 fullerene = ...[1]

Volume area of the C-60 fullerene = ..[2]

Dividing [1] by [2]:

The surface-to-volume ratio of a C-60 fullerene is 3:77.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.