Why was acetone used to zero the spectrophotometer instead of another solvent?

Why prairies are granaries of world give reasons? What is inside an ear? What is an imaginary line running halfway between the north pole and south pole this line is located at 0 degrees longitude? What is the 22 chromosome called? Why is smoke detectors made out of polystyrene? Dormant in a sentence? How much is twenty seven percent? Which one of the cells was studied first? What property of granite makes it useful for a) making roads b) forming the doorway to an important building? What columns of the periodic table do all of the elements have seven valence electrons? Is the Octet rule and how does it apply to organic compounds? What are some of the signs of renewal to Mount Saint Helen's? How do I write a short report about a person with an artificial body part? How can you digest and eat food if your stomach is removed by gastrectomy? How do you combine Ca n? Are there lava lakes? What is the opposite to accelerate? The length of a rectangle is 7 feet more than width if the length were decreased by 3 feet and the width were increased by 2 feet the perimeter would be 32 feet what is the length of the original re? What does the term hydration mean? When you go across the periodic table how does the atomic size go?