a (ni2+|ni) half cell is paired with a standard hydrogen electrode. if the observed voltage at 25C is +0.429V, what is the Ni2+ concentration?

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?