A solution weighing `a` g has molality `b`. The molecular mass of solute if the mass of solute is c g, will be:

Options

A. `c/bxx1000/((a-c))`
B. `b/axx1000/((a-b))`
C. `b/cxx1000/((a-c))`
D. `c/axx1000/((b-a))`

Explanation

To find the molecular mass of the solute in the given solution, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Molality**:
Molality (b) is defined as the number of moles of solute per kilogram of solvent. The formula for molality is:
\[
b = \frac{\text{moles of solute}}{\text{mass of solvent in kg}}
...