Question

what is a chemical reaction?what is the to write it please give quickly its urgent and no spam answer

Answer 1

 chemical reaction is a process that leads to the transformation of one set of chemical substances to another. 

Answer 2

the mode of communicating facts in chemical language about a chemical reaction is called chemical equation does a chemical equation is an expression for a given chemical change in term of symbol or formula of the reactants and products for example the reaction of Zinc and dilute sulphuric acid to produce zinc sulphate and hydrogen is given by the following equation :
Zn +H2SO4 -----------> ZnSO4 +H2..