Gas Stoichiometry Part Two

How do I move from grams to moles

• multiply by molar mass
• divide by molar mass
• multiply by Avo number
• divided by Avo number

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?

2 C2H2 + 5 O2 --> 2 H2O + 4 CO2

• 90 L

• 93.8 L

• 40.5 L

• 37.5 L

Tags

NGSS.HS-PS1-7

C2H2 undergoes combustion to produce carbon dioxide and water vapor. If 75 L CO2 is produced, what volume of H2O vapor is produced?

2 C2H2 + 5 O2 --> 2 H2O + 4 CO2

• 3.75 L

• 37.5 L

• 37.5 mL

• .375 mL

C2H2 undergoes combustion to produce carbon dioxide and water vapor. If 75 L CO2 is produced, how many liters of O2 are required?

2 C2H2 + 5 O2 --> 2 H2O + 4 CO2

• 37.5 L

• 3.75 L

• 93.8 L

• 9.38 L

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

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 Cu are produced?

• 0.250 mol

• 2.50 mol

• 25.0 mol

• 25.00000 mol

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 grams of Cu are produced?

• 200 g

• 15.9 g

• 159 g

• 899 g

Tags

NGSS.HS-PS1-7

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?

CS2 + 2 O2 ---> CO2 + 2 SO2

• 20 mL

• 150 mL

• 0.150 L

• 450 L