Consider the chemical equation in equilibrium.

2h2(g) + o2(g) < > 2h2o(g)

what will happen if the pressure of the system is increased?

a. the reaction will not change.
b. the reverse reaction will be favored.
c. the reaction will stop completely.
d. the forward reaction will be favored.

D. The forward reaction will be favored

The left side has more molecules, so the reaction mixture will try to counter the increase in pressure by reducing pressure. The pressure reduction will be achieved by shifting equilibrium to the side with less molecules.

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. 

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