Practice: Gas Stoichiometry

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
• 78 L

2CO + O₂ −-> 2CO₂

How many liters of Carbon dioxide are produced from 10.0 L of Oxygen, at STP?

• 10.0 L

• 20.0 L

• 5010 L

• 0.0199

Tags

NGSS.HS-PS1-7

During a science fair, Michael decides to demonstrate a chemical reaction by mixing aluminium with hydrochloric acid. The equation for the reaction is: 2Al + 6HCl --> 2AlCl₃ + 3H₂.

He aims to produce 11 L of hydrogen gas at STP. How many grams of aluminum does Michael need for his experiment?

• 13 g

• 8.8 g

• 0.99 g

• 1.0 g

Mg + 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

Mg₃N₂ + 3H₂O ––> 3 MgO + 2NH₃

If 10.3 g of magnesium nitride is used, what volume of ammonia gas (NH₃) would be collected at 20.0˚C and 0.989 atm?

• 4.57 L NH₃

• 4.96 L NH₃

• 0.261 L NH₃

• 13.2 L NH₃

What is Standard Temperature and Pressure (STP)?

• 1 Degree Celsius and 0 atm

• 0 Degrees Celsius and 1 atm

• 0 Kevin and 10 atm

• 273 Degrees Celsius and 273 atm

2Cu₂S + 3O₂ → 2Cu₂O + 2SO₂

How many grams of Copper (I) oxide are produced when 6.40 L of O₂ reacts with Copper (I) sulfide at a temperature 23.8°C and 10.7 atm.

• 268 g

• 178 g

• 27.2 g

• 40.9 g