What category do you think humans fall into?

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.

Easy definition for atom and atomic mass

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )