The molar mass of a compound (X), whose $2.6 ext{ mol}$ weighs $312 ext{ g}$, is:

Question

The molar mass of a compound (X), whose $2.6 	ext{ mol}$ weighs $312 	ext{ g}$, is:

Accepted Answer

1. **Identify the Formula:** The relationship between moles ($n$), mass ($m$), and molar mass ($M$) is given by:
   $$ n = \frac{m}{M} \implies M = \frac{m}{n} $$
   (Reference: Class 12 Chemistry, Unit 1, Example 1.2 uses this relationship for calculating moles).
2. **Substitute Values:**
   - Mass ($m$) = $312 	ext{ g}$
   - Moles ($n$) = $2.6 	ext{ mol}$
3. **Perform Calculation:**
   $$ M = \frac{312 	ext{ g}}{2.6 	ext{ mol}} $$
   $$ M = \frac{3120}{26} 	ext{ g mol}^{-1} $$
   $$ M = 120 	ext{ g mol}^{-1} $$

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