Give an example of where you may see heat and light produced in everyday life which is not evidence of a chemical reaction. explain the source of the heat and light.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

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

The bohr model of the atom explained why emission spectra are discrete. it could also be used to explain the photoelectric effect. which is a correct explanation of the photoelectric effect according to the model?