A sample of pure water contains A) a larger concentration of H20+ ions thun Ol' ions
B) equal concentrations of OH' and 11,0ions
© neither OH" ions nor H, 0* ions
D) a smaller concentration of H, 0+ ions than Olt ions

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

Compare and contrast physical changes with chemical changes.