Why is d compound CH3COCH2CH3 called butanone and not butan-2-one?

How much is 20 oz dry? Why grease is effective in preventing water loss? If you were to turn on a bulb in a dark closet. Light and heat would be produced. if thinking on conservation of energy why do the walls or floor not emit light when the bulb is off? Does the moon have more oxygen than earth? The spider plant produces cells in the runner by a process called mitosis what is this type of reproduction called? When a cell produce an endospores has that cell reproduced explain? A plant with a life cycle of one year is known as what? Why does algae not produce oxygen in ultra violet and infra red light I tried to experiment with this and the oxygen level actually reduced and did not increase in normal light? What is 12 30 pacific time in gmt? Were any people killed in hurricane Dennis? What is the most appropriate unit to use to measure the capacity of a small drinking glass? What is the IUPAC name of a benzene ring attched to another benzene ring as a substituent? What region in the table is most likely experiencing formation? How could a flood that kills individual plants help the same plant species to prosper? What is the relationship between homeostasis and diffusion? Do left sided identity and right sided inverse suffice to recover both sided axioms in group theory? What is a rich fauna? What are the differences between recycling and composting, and how can we effectively utilize both methods to reduce waste and promote sustainability? What could be done if you needed to remove the water from a sample of blood in order to study the solids that remained? The atomic mass of an atom tells?