What are the elements or compounds that enter into a chemical reaction? Chemistry Chemical Reactions Chemical Reactions and Equations 1 Answer anor277 Aug 27, 2017 #"The reactants.........."# Explanation: For #A+Brarr C+D#, #A# and #B# are the #"reactants"#, and #C# and #D# are the #"products"#. Given the particle nature of chemical reactivity, the MASS of #C# and #D# will be PRECISELY EQUAL to the MASS of #A# and #B#. Answer link Related questions Question #fee47 Question #c5c15 Question #19eb9 Question #e2ea2 Question #bc751 Question #e2ea6 Question #08b07 What is the thermochemical equation for the combustion of benzene? Why are chemical reactions reversible? Why are chemical reactions important? See all questions in Chemical Reactions and Equations Impact of this question 3101 views around the world You can reuse this answer Creative Commons License