What mass of iron(III) chloride contains 4.13 1023 chloride ions?

37.3g

Explanation:

Formula of the compound:

          FeCl₃

Number of chloride ions  =  4.13 x 10²³ ions

First find the number of moles in this ions;

         6.02 x 10²³ ions are contained in 1 mole of a substance

         4.13 x 10²³ ions contains  = 0.69mole chloride ions

Now;

        3 mole of chloride ions are contained in 1 mole of FeCl₃

       0.69 mole of chloride ions will contain = 0.23mole of FeCl₃

To find the mass;

         Mass of FeCl₃ = number of moles x molar mass

 molar mass of FeCl₃ = 55.8 + 3(35.5)  = 162.3g/mol

        Mass of FeCl₃ = 0.23  x  162.3  = 37.3g

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.