Gas stoichiometry

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

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

1Mg + 2H₂O --> Mg(OH)₂ + H₂

What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium?

• 62.0 L

• 0.12 L

• 2.77 L

• 1.15 L

Tags

NGSS.HS-PS1-7

Mg₃N₂ + 3H₂O ––> 3 MgO + 2NH₃

If 10.3 L of ammonia gas at 20.0˚C and 0.989 atm is created, how many liters of water at STP are required?

• 0.423 L H₂O

• 14.2 L H₂O

• 0.204 L H₂O

• 10.3 L H₂O

Tags

NGSS.HS-PS1-7

2CO + O₂ −-> 2CO₂

How many liters of carbon dioxide at STP are produced from 10.0 L of carbon monoxide at STP?

• 10.0 L

• 20.0 L

• 5010 L

• 0.0199

Tags

NGSS.HS-PS1-7

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

When solving for gas stoichiometry problems which of the following is correctly matched?

• STP conditions; molar mass

• NON STP conditions; PV=nRT

• STP conditions; PV=nRT

• NON STP conditions; 22.4 moles

2NaN₃ → 2Na + 3N₂

At what pressure(atm) is the nitrogen gas sample that is collected when 48.4 g of NaN₃ decomposes? The temperature of the gas is 25.0°C and the volume is 18.4 L.

• 151 atm

• 1130 atm

• 0.125 atm

• 1.48 atm

Tags

NGSS.HS-PS1-7

You have 3.5 L of H₂ (g) at STP. How many moles of gas are there?

• 22.4 mol
• 22.4 L
• 0.16 mol
• 0.16 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