Rite an equation for the formation one mole of CaCO3(s) from its elements in their standard states. Write any reference to carbon as C(s). Express your answer as a chemical equation using fractional coefficients as needed. Identify all of the phases in your answer.

The chemical equation for the formation one mole of from its elements in their standard states is

Explanation:

The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

The chemical equation for the formation one mole of from its elements in their standard states is:

where (s) represents solid state and (g) represents gaseous state.

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.