In some classic studies on the fermentation of glucose to ethanol and CO2 by extracts of brewer's yeast, it was observed that inorganic phosphate (Pi) was essential to fermentation; when the supply of inorganic phosphate was exhausted, fermentation ceased before all the glucose was used. Why did fermentation cease when the supply of inorganic phosphate was exhausted?

The correct answer is a

Temperature and pressure

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. 

Answer(d) unstable compounds that convert to acetals in the presence of alcohol and an acid; (b) semiacetals produced by alcohol subtraction from ketone;