How many days apart are the first quarter and the last quarter of the moon?

What is an example of an chemical change? What can you do when listening to someone to channel the extra mental energy you have? How may neutrons in Aluminium? How long does a paint ball welts stay on your body? Is quality relative or absolute? Where do the majority of earthquakes take place? How can you measure the mass of weight? What is difference between anhydrous and dried basis? What is the physical appearance of methyl orange? What is water evaporation from plant parts called? What are the two functions of bacterial appendages? Do you use the right brain to remember stuff? Why do these regions lead scientists to hypothesize that there may have once been life on mars? Which nerve damage results in wristdrop inability to extend the hand at the wrist? Should you EVER take someone else's antibiotics as prevention against carbapenem-resistant Enterobacteriaceae or CRE infection? Which of these method does not form acids? What problems arise for firms with offices in widely scattered time zones? What are the hardest colors to find for redline hotwheels? What does DYNTW mean? Why are Earth's and Venus interiors still hot but the interior of Mars and Mercury have cooled even though they all formed at the same time and Mercury is the closest planet to the sun?

How many days apart are the first quarter and the last quarter of the moon?