Find the ΔHr0 for the reaction:
Na2CO3(s) +2HNO3(aq) → 2NaNO3(s) +CO2(g) +H2O(l)

ΔHr0=+125.7kJ

ΔHr0=-67.2kJ

ΔHr0=-45.3kJ

ΔHr0=-140.0kJ

ΔHr0=+105.8kJ

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

The correct answer would be b) volume versus temperature, because they are also directly proportional.