📘 Step-by-Step Solution
Step 1: Given Data
Mass of CO₂ = 44 g
We have to calculate the number of CO₂ molecules present in 44 g of CO₂.
Step 2: Calculate Molar Mass of CO₂
Atomic masses:
C = 12 g mol⁻¹
O = 16 g mol⁻¹
O = 16 g mol⁻¹
Therefore:
Molar Mass of CO₂
= 12 + (2 × 16)
= 12 + 32
= 44 g mol⁻¹
= 12 + (2 × 16)
= 12 + 32
= 44 g mol⁻¹
🎬 CO₂ Molecular Animation
C
O
O
CO₂ = 44 g mol⁻¹
One molecule of CO₂ contains 1 carbon atom and 2 oxygen atoms.
Step 3: Calculate Number of Moles
Use:
Number of moles = Mass ÷ Molar Mass
Substituting the values:
n = 44 ÷ 44
n = 1 mol
n = 1 mol
Step 4: Use Avogadro's Number
We know that:
1 mole = 6.022 × 10²³ molecules
Therefore, 1 mole of CO₂ contains:
Number of molecules
= 1 × 6.022 × 10²³
= 6.022 × 10²³ molecules
= 1 × 6.022 × 10²³
= 6.022 × 10²³ molecules
🎬 Mass → Mole → Molecules
44 g CO₂
→
1 mol CO₂
→
6.022 × 10²³ molecules
✅ Final Answer
Number of CO₂ molecules
= 6.022 × 10²³
Therefore, 44 g of CO₂ contains 6.022 × 10²³ molecules.
🎯 Quick Formula
Moles = Mass ÷ Molar Mass
Molecules = Moles × 6.022 × 10²³
44 ÷ 44 = 1 mol
Molecules = 6.022 × 10²³
Molecules = Moles × 6.022 × 10²³
44 ÷ 44 = 1 mol
Molecules = 6.022 × 10²³
