Gas Stoichiometry at STP

How do I change from moles to liters?

• divide by 22.4
• multiple by Avo number
• multiply by 22.4
• multiply by molar mass

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

• 62L
• 65L
• 31L
• 124L

C2H2 undergoes combustion to produce carbon dioxide and water vapor. If 75 L CO2 is produced, how many liters of C2H2 are required?

• 90 L

• 93.8 L

• 40.5 L

• 37.5 L

Tags

NGSS.HS-PS1-7

Assume that 5.6 L H2 at STP reacts with excess CuO according to the following equation:

CuO + H2 ---> Cu + H2O

How many moles of H2 react?

• 0.50 mol

• 0.250 mol

• 0.250 g

• 0.50 g

If liquid carbon disulfide reacts with 450 mL of oxygen to produce to gases carbon dioxide and sulfur dioxide, what volume of each product is produced?

• 20 mL

• 150 mL

• 0.150 L

• 450 L

2CO  +  O₂  −-> 2CO₂
How many liters of carbon dioxide are produced from 10L of carbon monoxide?

• 10
• 20
• 1
• 5

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

Balance this reaction: ____ RbNO₃ + ____ BeF₂ ----> ____ Be(NO₃)₂ + ____ RbF

• 1,1,1,1
• 1,2,1,1
• 2,1,1,2
• 2,1,2,1

Balance this reaction: ____ RbNO₃ + ____ BeF₂ ----> ____ Be(NO₃)₂ + ____ RbF

• 1,1,1,1
• 1,2,1,1
• 2,1,1,2
• 2,1,2,1