Pls a process in the carbon cycle is seen when carbon in coal burns in the presence of oxygen to form carbon dioxide. which of the following statements best proves that the law of conservation is obeyed during this process? 1.the total mass of carbon used up is equal to the total mass of oxygen used up. 2.the total mass of oxygen and carbon dioxide is equal to the total mass of carbon. 3.the total mass of oxygen and carbon is equal to the total mass of carbon dioxide. 4.the total mass of carbon used up is equal to the total mass of carbon dioxide formed.

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.  

1 is the answer to this problem