What particles are involved in nuclear reactions, but not in chemical reactions? neutrons and protons neutrons and electrons protons and electrons electrons only

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.