Chapter 14, Problem 114A

Interpretation Introduction

Interpretation: To calculate the molar mass of the given substance.

Concept Introduction: Molar mass is defined as the smallest unit of the compound. It is the $\frac{1}{12}\text{th}$ mass of the Carbon-12. Molar mass is defined as the sum of total mass in grams of all the atoms that make up a mole of the molecule.

Answer to Problem 114A

205.92 g/mol

Explanation of Solution

Given that the mass of lead atom is 17.16 times more than that of the carbon-12 atom

The mass of Carbon-12 atom is 12 g/mol

Since, the mass of lead is 17.6 times greater than that of the carbon-12 atom. The mass of lead will be $12\times 17.16=205.92\frac{\text{g}}{\text{mol}}$ .

Therefore, the molar mass of the isotope of lead will be 205.92 g/mol.

Conclusion

The molar mass is nothing but the mass of one mole of that element. This molar mass is also used for calculation of concentration terms like molality, molarity and also for the calculation of number of moles.