Chapter 20, Problem 20.99QP

Interpretation Introduction

Interpretation: The volume of He collected at STP should be found by considering the given data.

Concept Introduction:

To calculate the nuclear binding energy.

• On accordance with law of conservation of mass, for any chemical reaction, total masses of reactants and products must be equal.
• Firstly determine the difference between the mass of the nucleus and the mass of all the protons and neutrons, which yields the mass defect.
• Next, we must apply Einstein mass – energy relationship.
• The nuclear binding energy per nucleon is given by the following equation
• Nuclear binding energy per nucleus= $\frac{\text{nuclear binding energy}}{\text{number of nucleons}}$
• Einstein mass energy relationship [ $\text{ΔE}=({\text{ΔM)c}}^{\text{2}}$].

To identify: The Calculate initial moles of ${\text{Ra}}^{\text{226}}$ $\text{4}\text{.42}\times {\text{10}}^3{\text{ mol }}^{226}\text{Ra}$