An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Which terms are used to identify pure substances

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