Determine the number of atoms of O in 57.4 moles of Al2(CO3)3.

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**Question 11 of 14**

Determine the number of atoms of O in 57.4 moles of Al₂(CO₃)₃.

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To solve this problem:

1. **Identify the composition of the compound:**
   - The chemical formula Al₂(CO₃)₃ includes aluminum (Al), carbon (C), and oxygen (O).
   - Each formula unit of Al₂(CO₃)₃ contains 3 carbonate ions (CO₃²⁻).

2. **Determine the number of oxygen atoms per formula unit:**
   - Each CO₃ ion contains 3 oxygen atoms.
   - Therefore, Al₂(CO₃)₃ consists of 3 × 3 = 9 oxygen atoms per formula unit.

3. **Calculate the total number of moles of oxygen atoms in 57.4 moles of Al₂(CO₃)₃:**
   - Total moles of oxygen = 57.4 moles × 9 = 516.6 moles of oxygen atoms.

4. **Convert moles of oxygen atoms to the number of atoms using Avogadro's number (6.022 × 10²³ atoms/mol):**
   - Total number of oxygen atoms = 516.6 moles × 6.022 × 10²³ atoms/mol.

5. **Final calculation:**
   - Total number of oxygen atoms ≈ 3.111 × 10²⁶ atoms.

This detailed step-by-step process helps determine the total number of oxygen atoms present in a given number of moles of the compound Al₂(CO₃)₃.
Transcribed Image Text:**Question 11 of 14** Determine the number of atoms of O in 57.4 moles of Al₂(CO₃)₃. --- To solve this problem: 1. **Identify the composition of the compound:** - The chemical formula Al₂(CO₃)₃ includes aluminum (Al), carbon (C), and oxygen (O). - Each formula unit of Al₂(CO₃)₃ contains 3 carbonate ions (CO₃²⁻). 2. **Determine the number of oxygen atoms per formula unit:** - Each CO₃ ion contains 3 oxygen atoms. - Therefore, Al₂(CO₃)₃ consists of 3 × 3 = 9 oxygen atoms per formula unit. 3. **Calculate the total number of moles of oxygen atoms in 57.4 moles of Al₂(CO₃)₃:** - Total moles of oxygen = 57.4 moles × 9 = 516.6 moles of oxygen atoms. 4. **Convert moles of oxygen atoms to the number of atoms using Avogadro's number (6.022 × 10²³ atoms/mol):** - Total number of oxygen atoms = 516.6 moles × 6.022 × 10²³ atoms/mol. 5. **Final calculation:** - Total number of oxygen atoms ≈ 3.111 × 10²⁶ atoms. This detailed step-by-step process helps determine the total number of oxygen atoms present in a given number of moles of the compound Al₂(CO₃)₃.
Expert Solution
Introduction

there are 6.022 ×1023 molecules present in 1 mole of any substance. 

This number is known as Avogadro's number. 

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