Question

1. how many liters does 1.00 mole of any gas occupy at stp?

a. 11.2 l
b. 22.4 l
c. 44.8 l
d. 1.00 l

1. how many liters are in 2.50 moles of nitrogen gas (n₂) at stp?

a. 11.2 l
b. 22.4 l
c. 56.0 l
d. 44.8 l

1. how many moles are in 44.8 l of oxygen gas at stp?

a. 1.00 mol
b. 2.00 mol
c. 0.50 mol
d. 4.00 mol

1. how many liters will 0.75 moles of carbon dioxide occupy at stp?

a. 16.8 l
b. 22.4 l
c. 33.6 l
d. 44.8 l

1. how many moles are in 11.2 l of hydrogen gas at stp?

a. 0.25 mol
b. 0.50 mol
c. 1.00 mol
d. 2.00 mol

Explanation:

Step1: Recall STP molar volume

At STP, 1 mole of any gas = $22.4\ \text{L}$

Step2: Solve Q12: 1 mole gas volume

Volume = $1.00\ \text{mol} \times 22.4\ \frac{\text{L}}{\text{mol}} = 22.4\ \text{L}$

Step3: Solve Q13: 2.50 mol N₂ volume

Volume = $2.50\ \text{mol} \times 22.4\ \frac{\text{L}}{\text{mol}} = 56.0\ \text{L}$

Step4: Solve Q14: Moles in 44.8 L O₂

Moles = $\frac{44.8\ \text{L}}{22.4\ \frac{\text{L}}{\text{mol}}} = 2.00\ \text{mol}$

Step5: Solve Q15: 0.75 mol CO₂ volume

Volume = $0.75\ \text{mol} \times 22.4\ \frac{\text{L}}{\text{mol}} = 16.8\ \text{L}$

Step6: Solve Q16: Moles in 11.2 L H₂

Moles = $\frac{11.2\ \text{L}}{22.4\ \frac{\text{L}}{\text{mol}}} = 0.50\ \text{mol}$

Answer:

1. B. 22.4 L
2. C. 56.0 L
3. B. 2.00 mol
4. A. 16.8 L
5. B. 0.50 mol