Questions: Part 2: Moles ↔ Particles Conversions 5. 0.0455 moles of HCl to number of molecules

Transcript text: Part 2: Moles $\leftrightarrow$ Particles Conversions 5. 0.0455 moles of HCl to number of molecules

Solution

Solution Steps

Step 1: Understand the Problem

We need to convert 0.0455 moles of HCl into the number of molecules. This requires using Avogadro's number, which is the number of particles (atoms, molecules, etc.) in one mole of a substance.

Step 2: Use Avogadro's Number

Avogadro's number is $6.022 \times 10^{23}$ particles per mole. To find the number of molecules in 0.0455 moles of HCl, we multiply the number of moles by Avogadro's number.

Step 3: Perform the Calculation

\[ \text{Number of molecules} = 0.0455 \, \text{moles} \times 6.022 \times 10^{23} \, \text{molecules/mole} \]

\[ = 2.739 \times 10^{22} \, \text{molecules} \]