1. Which of the following best describes convection? * (10 Points)
placing hands near a hot burner
putting a metal spoon in a mug of hot water
turning on an air conditioner in a hot room
turning on an electrical current

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1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged

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.