A student conducting a calorimetry investigation determines a negative ∆H. What does the negative value indicate about the reaction? A. The reaction synthesized a single product.

B. The reaction was exothermic.

C. The reaction absorbed energy.

D. The reaction involved decomposition.

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. 

The library of congress appointed w. s. merwin to the prestigious, respected position of poet laureate consultant.

Mars contains iron oxide in its crust