CaCO3 --> CaO+ C02 24.80g 13.90g ?
Using the Law of Conservation of Mass, what was the mass of the CO2 produced in the chemical reaction?

he mass of CO2 produced is 3.29*10^-3g.

Explanation:

We know that the reaction goes to completion, so all the methane will be reacted. To find the mass of carbon dioxide used, we can use the number of moles from the above equation, and the molecular weight of CO2 (= 44.009 g/mol).

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.