Uranium-232 has a half-life of 68.8 years. after 344.0 years, how much uranium-232 will remain from a 100.0-g sample?
1.56 g
3.13 g
5.00 g
20.0 g

 3.13 g

Explanation: Radioactive decay follows first order kinetics.

Equation for half life of first order reaction is:

Half-life of uranium-232 = 68.8 years

N = amount left after time t

= initial amount = 100g

= rate constant

t= time

= 100 g, t= 344 years,

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.