3- What property comes into play to define the polarity of a molecule? Explain
4- Why does water expand when going from liquid to solid? Investigate what role this feature plays in rock erosion and fragmentation.
6- Why does liquid water float in liquid water?

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg