What are the cons of chemical reactions?

From the negative effects of chemical reactions is the environmental pollution resulting from the emission of some harmful gases from these chemical reactions. The burning reaction is considered from the reactions that produce a lot of pollutant gases such as Fuel-burning, burning of coal and cellulose fibers.

Explanation:

c8h10 is your answerr

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer