The empirical formula : C₁₁O₁₄O₃
<h3>Further explanation</h3>
The assumption of the compound consists of C, H, and O
mass of C in CO₂ =

mass of H in H₂O =

mass of O :
mass sample-(mass C + mass H)

mol of C :

mol of H :

mol of O :

divide by 0.0155(the lowest ratio)
C : H : O ⇒

pH can be defined as negative logarithm of hydronium ion concentration .
pH can be mathematical represented as :
pH =-log [H+]
[H+]=2.3*10^-9
pH= -log[2.3*10^-9]
=8.64
Answer:
Chemistry is the science of matter, its properties, structure, changes or reactions and the energy that accompanies these changes.
B, mode since mode represents the data is the most frequent in the whole set, which in this case is 8cm