QUESTION 3 The unknown ionic compound gave a dark red flame test, precipitate with ammonium carbonate, and a colorless/light yellow halide test. What is the unknown compound? Write the answer
as an ionic compound with cation then anion, charges balanced. Since the answer doesn't allow subscript, write the number without subscript. For example CaCl2

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.