Consider a tank used in certain hydrodynamic experiments. after one experiment the tankcontains 200 l of a dye solution with a concentration of 1 g/l. to prepare for the next experi-ment, the tank is to be rinsed with fresh water flowing in at a rate of 2 l/min, the well-stirredsolution flowing out at the same rate. find the time that will elapse before the concentrationof dye in the tank reaches 1% of its original value.

Explanation:

1. Set up an expression for the rate of change of dye concentration.

2. Integrate the expression

3. Find the constant of integration

4. Solve for A as a function of time.

5. Calculate time to reach 1 % of original concentration

The initial concentration was 1 g/L, so the new concentration is 0.01 g/L

The diagram shows the concentration starting at 1 g//mL and decreasing asymptotically to 0.01 g/mL after 460 min.

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.

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