**Category:** Inorganic Chemistry  
**Subtype:** Chemical Reactions  
**Problem Description:** This problem involves a reaction between a metal mixture and hydrochloric acid (HCl) that produces hydrogen gas (H₂) and a salt. The task is to determine the mass of the anhydrous salt formed after the reaction. 

**Key Points:**
- You start with a 10.0 g mixture of two metals.
- The reaction with excess HCl produces 2.24 liters of hydrogen gas at standard conditions (STP).
- After the reaction, you need to find the mass of the resulting anhydrous salt. 

**Options for the mass of the salt:** 
A. 1.71 g  
B. 34.20 g  
C. 13.55 g  
D. 17.10 g