Chapter 6, Problem 17A

Interpretation Introduction

Interpretation:The mass of 1 mole of a substance in grams needs to be determined.

Concept Introduction: The molecular mass of a compound is the sum of the atomic mass of all the atoms present in the given chemical compound. Mole concept is used to calculate the moles, mass, number of atoms and moles of a compound.

Answer to Problem 17A

Molar mass is the mass of 1 mole of a substance.

Explanation of Solution

The molar mass of a substance is the mass of 1 mole of a substance. It is represented in g/mol. The relation between these values can be shown as:

  $\text{Moles = }\frac{\text{mass}}{\text{molar mass}}$

On rearranging,

  $\text{ molar mass= }\frac{\text{mass}}{\text{Moles}}$

Thus, the unit of molar mass will be g/mol.

Conclusion

Molar mass is the mass of 1 mole of a substance.