2. Leaves turning brown in the fall Chemical or Physical or Both

What Evidences show that it’s Chemical, Physical, or Both:

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

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

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate