Which family on the periodic table contains elements that already have the octet in their valence energy level

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate