Chapter 2, Problem 99SAE

Interpretation Introduction

Interpretation:

The O: Rb mass ratio for the second oxide of rubidium needs to be identified from the given options.

Concept introduction:

• The number of atoms or molecules of a substance is expressed in terms of moles.
• 1 mole of a given substance is equivalent to its atomic mass (or molar mass) and contains Avogadro’s number ( $6.023\times {10}^{23}$ ) of particles of that substance.
• Atoms combine in fixed ratios to form molecules which are exemplified by the law of constant proportion.