Which cell structure is the gatekeeper, controlling what goes in and out of the cell? a) c - nucleus b) e - vacuole c) a - cell membrane d) b - endoplasmic reticulum

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 statements are true about electrolysis? check all that apply. electrolysis requires an acid be present. electrolysis is described by two half-reactions. electrolysis is not an industrial process. electrolysis results in commercially valuable products. electrolysis involves the transfer of electrons. reduction results in the loss of electrons. oxidation results in the loss of electrons.

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5