(a) Define the following terms:
(i) Molarity
(ii) Molal elevation constant `(k_(b))`
(b) A solution containing 15 g (molar mass=60 g `mol^(-1))` per litre of solution water has the same osmotic pressure (isotonic ) as a solution of glucose (molar mass =180g `mol^(-1))` in water calculate the mass of glucose present in one litre of its solution.

Explanation

### Step-by-Step Solution

#### (a) Definitions

**(i) Molarity (M)**
Molarity is defined as the number of moles of solute per liter of solution. It can be mathematically expressed as:

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