some fire extinguishers contain carbon dioxide under very high pressure use the first law of thermodynamics to explain why some carbon dioxide solidifes as dry ice when released from such a fire extinguisher?​

Plss anybody know how to do this? ? i need the answers from a through d

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.