Answer:
Is is talking about h20 water?
Step-by-step explanation:
2C8H18 + 25O2 ----> 16CO2 + 18H2O
Basically you can first list all your elements from your products and reactants:
C 8 x 2 C 1 x 16
H 18 x 2 H 2 x 18
O 2 x 25 O (2 x 18) + (2 x 16)
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