The rate constant for a certain reaction is k = 6.20×10−3 s−1 . If the initial reactant concentration was 0.200 M, what will the concentration be after 20.0 minutes?

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