1. The number of mole in 15.5 g of SO₂ is 0.242 mole
2. The mass of 1.50 mole of C₃H₈ is 66 g
3. The number of mole of NH₃ that contains 1.5×10²³ molecules is 0.249 moles
4. The mass of NaCl that contains 2.5×10²⁵ formula units is 2429.4 g
5. The number of molecules present in 3.6 moles of CO₂ is 2.167×10²⁴ molecules
<h3>1. How to determine the mole of SO₂</h3>
- Mass of SO₂ = 15.5 g
- Molar mass of SO₂ = 32 + (2×16) = 64 g/mol
- Mole of SO₂ =?
Mole = mass / molar mass
Mole of SO₂ = 15.5 / 64
Mole of SO₂ = 0.242 mole
<h3>2. How to determine the mass of C₃H₈</h3>
- Mole of C₃H₈ = 1.5 mole
- Molar mass of C₃H₈ = 44 g/mol
Mass = mole × molar mass
Mass of C₃H₈ = 1.5 × 44
Mass of C₃H₈ = 66 g
<h3>3. How to determine the mole of NH₃ </h3>
From Avogadro's hypothesis,
6.02×10²³ molecules = 1 mole of NH₃
Therefore,
1.5×10²³ molecules = 1.5×10²³ / 6.02×10²³
1.5×10²³ molecules = 0.249 mole of NH₃
<h3>4. How to determine the mass of NaCl </h3>
6.02×10²³ units = 58.5 g of NaCl
Therefore,
2.5×10²⁵ units = (2.5×10²⁵ × 58.5) / 6.02×10²³
2.5×10²⁵ units = 2429.4 g of NaCl
<h3>5. How to determine the number of molecules </h3>
1 mole of CO₂ = 6.02×10²³ molecules
Therefore,
3.6 moles of CO₂ = 3.6 × 6.02×10²³
3.6 moles of CO₂ = 2.167×10²⁴ molecules
Learn more about Avogadro's number:
brainly.com/question/26141731
