Examine the equation.

c3h8 + 5o2 → 3co2 + 4h2o

what are the roles of the substances in the equation?

the substances c3h8 and 3co2 are reactants that react to form the products 5o2 and 4h2o.
the substances 3co2 and 4h2o are reactants that react to form the products c3h8 and 5o2.
the substances 5o2 and 3co2 are reactants that react to form the products c3h8 and 4h2o.
the substances c3h8 and 5o2 are reactants that react to form the products 3co2 and 4h2o.

Show an image of the data (˵¯͒ བ¯͒˵)

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.