It means that a chemical reaction has taken place, and copper sulfate, carbon dioxide, and water have combined somehow.
Then there would be an "equal" sign, and on the other side of the chemical equation would be another bunch of symbols for compounds, showing what chemicals came out of the reaction.
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Burning, oxidation.
Chances are the C and the H are together with multiple amounts. If so you'll get carbon dioxide (CO2) and water (H2O)
The anwer is 2 (C2H6) + 7(O2) =4 (CO2) + 6 ( H2O) left side : C=4 , H= 12, O=14 right side : C=4 , H= 12, O=14 so they are balanced.
cl2o7+h2o
h2o,Nacl,Co2,O2,O3