Technetium-104 has a half life of 18 minutes. How much of a 165.0 g sample is left after 108.0 minutes?

Can someone me with questions 15 to 17 plz.

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

What term describes technology that operates on an atomic level