if 6.2g of copper carbonate is decomposed by heating, calculate the volume of carbon dioxide produced at room temperature and pressure

the answer is a. co2, this would be colder than the : )

explanation:

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

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.