Ideal Gas Law and Gas Stoichiometry

What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium with excfess water according to the following reaction?

1Mg + 2H₂O --> Mg(OH)₂ + H₂

• 62.0 L

• 65.3L

• 31.0L

• 124.1L

Tags

NGSS.HS-PS1-7

Determine the Celsius temperature of 2.49 moles of gas contained in a 1.00-L vessel at a pressure of 143 kPa. 

• -266 degrees C
• -622 degrees C
• 622 degrees C 
• 266 degrees C

Tags

NGSS.HS-PS3-1

2Al + 6HCl --> 2AlCl₃ + 3H₂

Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?

• 13

• 8.8

• 0.99

• 1.0

Tags

NGSS.HS-PS1-7

An 18.0 liter container holds 16.00 grams of oxygen gas (O₂) at 45.0 °C. What is the pressure in the container?

• 0.725 atm

• 11.0 atm

• 23.2 atm

• 1.45 atm

Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.

• 7.18 L 
• 7.81 L
• 4.63 L
• 4.36 L

How many liters of NH₃ are needed to react completely with 30.0L of NO?

4NH₃(g) + 6NO (l)--> 5N₂ (g) + 6H₂O (l)

• 5.0 L

• 20.0 L

• 7.5 L

• 120.0 L

Tags

NGSS.HS-PS1-7

Mg₃N₂ + 3H₂O → 3MgO + 2NH₃

How many grams of water are required to produce 10.3 L of ammonia gas at STP?

• 0.423 g H₂O

• 12.4 g H₂O

• 30.4 g H₂O

• 10.3 g H₂O

Tags

NGSS.HS-PS1-7

When 0.250 moles of a gas is placed in a container at 25 °C, it exerts a pressure of 700 mm Hg. What is the volume of the container?

• 0.557 Liters
• 6.57 Liters
• 8.74 Liters
• 0.0087 Liters

Bonus Problem: (not covered in class)

Mg₃N₂ + 3H₂O ––> 3 MgO + 2NH₃

If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20˚C and 0.989 atm?

• 4.9 L NH₃

• 4.96 L NH₃

• 0.261 L NH₃

• 0.26 L NH₃

Tags

NGSS.HS-PS1-7

Bonus: (not covered in class)

4NH₃+6NO --> 5N₂ + 6H₂O

How many liters of NH₃ at 32.6 ^oC and 4.25 kPa are needed to react completely with 30.0L of NO at STP?

• 5.27 L

• 534 L

• 5.2 L

• 533.6 L

Tags

NGSS.HS-PS1-7