The presence of H3O+ is the hydronium ion, and one definition of an acid is something that donates a proton (H+). HCl in this case does just that. Basic solution forming with NaOH and water: ... NaOH + H2O ==>Na+ + OH- so it donates or produces OH- ions, thus making a basic solution
The deeper you dig into soil, the wetter it is.
The answer is d noble gas because the very last column on the periodic table is all the noble gases
To determine the heat change during a reaction, we need to know the heat of reaction of the process. For this case, the heat of formation is needed since it is a formation reaction. It will have units of kJ per mole. We determine the heat change as follows:
Heat change = 3352 kJ / 2 mol Al2O3( 1 mol Al2O3) = 1676 kJ