226k views
1 vote
How many moles are present in 1.2 dm³ of sulfur dioxide (SO₂) at RTP (room temperature and pressure)?

A) 0.054 moles
B) 0.024 moles
C) 2.4 moles
D) 0.6 moles

1 Answer

4 votes

Final answer:

At RTP, 1 mole of gas occupies 22.4 dm³. To find the moles of SO₂ in 1.2 dm³, divide the volume by the molar volume, which gives approximately 0.054 moles. The correct answer is A) 0.054 moles.

Step-by-step explanation:

To determine how many moles of sulfur dioxide (SO₂) are present in 1.2 dm³ at RTP, we use the molar volume of a gas at room temperature and pressure. RTP is generally considered to be 0°C (273 K) and 1 atmosphere. At RTP, one mole of any ideal gas occupies 22.4 dm³. Therefore, to find the moles of SO₂ in 1.2 dm³, we use the following calculation:

moles of SO₂ = volume of SO₂ (dm³) / molar volume at RTP (dm³/mol)

moles of SO₂ = 1.2 dm³ / 22.4 dm³/mol

moles of SO₂ = 0.05357 mol

When rounded to two decimal places, this value is approximately 0.054 moles.

So, the correct answer is A) 0.054 moles.

User Cybercop
by
8.1k points

No related questions found