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15-12-2020
Chemistry

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How many molecules are in 7.5*10^19 particles of Fe2O3?

Respuesta :

15-12-2020

Answer:

7.5 × 10¹⁹ molecules Fe₂O₃

General Formulas and Concepts:

Chemistry - Atomic Structure

Using Dimensional Analysis
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

7.5 × 10¹⁹ particles Fe₂O₃

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]7.5 \cdot 10^{19} \ particles \ Fe_2O_3(\frac{6.022 \cdot 10^{23} \ molecules \ Fe_2O_3}{6.022 \cdot 10^{23} \ particles \ Fe_2O_3} )[/tex] = 7.5 × 10¹⁹ molecules Fe₂O₃

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