What is the lightest material ever created by the hands of men

Based on its chemical properties, identify the position of each chemical family on the periodic table.

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?