**Category:** Organic Chemistry  
**Subtype:** Stoichiometry and Chemical Reactions  
**Problem Description:** This problem involves a mixture of an amine (X) and a hydrocarbon (Y). It requires calculating the mass of the hydrocarbon Y in a given amount of the mixture E, based on combustion data and reaction with HCl. 

**Key Points:**
- The mixture E consists of an amine (X) and a hydrocarbon (Y), with more moles of X than Y.
- Combustion of 0.26 mol of E produces nitrogen gas (N₂), carbon dioxide (CO₂), and water (H₂O), requiring 2.51 mol of O₂.
- When reacted with excess HCl, the maximum amount of HCl that reacts is 0.28 mol.
- The goal is to find the mass of hydrocarbon Y in the 0.26 mol of mixture E. 

**Options for the mass of Y:** 
A. 10.32 g  
B. 10.55 g  
C. 12.00 g  
D. 10.00 g