A sample of a gas (50 mol) at 10 atm is expanded at constant tomperature from 10 L to 15 L. The final prossure is atm
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11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.