Why isn't there a lunar eclipse every time Earth is in between the sun and
the Moon?

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Which of the following statements are incorrect?

Molecules that have the same chemical formula (same numbers of each atom) but different three-dimensional shapes are called molecules that have the same chemical formula (same numbers of each atom) but different three-dimensional shapes are called functional groups isotopes hydrocarbons isomers enantiomers