A 25.0 mL sample of waste water is obtained to analyze for Pb2 ions. This sample is evaporated to dryness and redissolved in 2.0 mL of H2O, mixed with 2.0 mL of a buffer solution and 2.0 mL of a solution of dithizone then diluted to 10.0 mL. The absorbance of the colored Pb2 - dithizone complex is compared with the Beer-Lambert plot below. 8. The absorbance of a portion of the final solution is 0.13. What is the concentration of Pb2 ions in the waste water in ppm

The total number of electrons is 14

A. ​it generates energy from carbohydrates.b. it requires activation by oxygen.​c. ​it is used by cells to dispose of excess electrons

It must be measured in k.hope my answer is to you : )

Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f.