If you have 200 grams of a radioactive sample, how many grams would be left after three half-lives?
select one:
a. 200
b. 150
c. 50
d. 25

Atank contains 240 liters of fluid in which 10 grams of salt is dissolved. brine containing 1 gram of salt per liter is then pumped into the tank at a rate of 6 l/min; the well-mixed solution is pumped out at the same rate. find the number a(t) of grams of salt in the tank at time t.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution