In the equation zn+2hcl > zncl2 + h 2 the reactants are

Zn  and  HCl   are  the reactant  in  the  equation   above.  zinc  react  with   2  moles  of  Hcl  to  form  zinc  chloride  and a  hydrogen  molecule.  The  one  equation  means  that  the   reaction  proceed  to  the forward  side  only  therefore  no  reverse  of  the  reaction.

The direct organizational plant for a routine message requires that you present the primary ideas first and then any supporting evidence. This plan emphasizes deduction, understanding the implications (details) of a central idea rather than presenting particulars first building toward the central idea of a message.