Molar volume of gases (3.5)

Question 1

Equal amounts in moles of gases occupy the (…) volume under the (…) conditions of (…) and (…)

Answer 1

same

same

temperature

pressure

Question 2

What is the volume of one mole of any gas at room temperature and pressure?

Answer 2

24dm³

Question 3

What is the value of room temperature and pressure?

Answer 3

(20^oC and 1 atmosphere pressure)

Question 4

What is the formula for moles given the volume of gas (at rtp)?

Answer 4

Moles = volume of gas at rtp / 24dm

Question 5

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

3.6dm³ carbon dioxide is produced when a sample of propane is burned in 7.25cm³ oxygen

Calculate the volume of unreacted oxygen in cm³

Answer 5

3. 6 / 3 = 1.2dm³
4. 2 x 5 = 6dm³
5. 25 - 6 = 1.25dm³

= 1250cm³