Stoichiometry Review

Reorder the following steps in order to answer the following question:

How many liters of O₂ gas are needed to react with 3.46 g of H₂ to form water?

2 H₂ + O₂ --> 2 H₂O

• Convert grams of H₂ to mole using molar mass

• Convert moles of H₂ to moles of O₂ using balanced equation

• Use PV = nRT to solve for liters of O₂

Match the following conversion factors with the proper unit

• molar mass

• Liters of a gas NOT at STP

• M = mol/L

• atoms/molecules/particles

• 22.4

• grams

• 6.02 x 10²³

• Liters of a solution

• PV = nRT

• Liters of a gas at STP

Drag the following labels to show the equation for percent yield.

a

b

c

Actual

Theoretical

100

Reorder the following steps to solve the following question:

How many atoms of Cu would be produced from a 65.0mL of a 4.00M Copper (II) Chloride solution?

2 Al + 3 CuCl₂ --> 3 Cu + 2 AlCl₃

• Round answer using 3 sig. fig.

• Convert mol of Cu to atoms using 6.02 x 10²³

• Convert mol of CuCl₂ to mol of Cu using balanced equation

• Convert 65.0mL to L

Tags

NGSS.HS-PS1-7

Select the proper units when using PV = nRT

• atm

• K

• mL

• L

Select the correct units when using the molarity equation

• grams

• moles

• mL

• L