Stoichiometry and Molar Mass Calculations

This video tutorial provides a comprehensive guide to solving stoichiometry problems, including mass-to-mass, mass-to-mole, and mole-to-mole conversions. It covers the importance of balancing chemical equations and demonstrates various examples, such as converting moles of ethylene to CO2, mass of lithium hydroxide to moles of lithium bromide, and mass of potassium chlorate to potassium chloride. The tutorial also addresses complex stoichiometry problems, emphasizing the use of molar mass and mole ratios.

What is the first step in solving stoichiometry problems?

• Calculate the molar mass

• Balance the chemical equation

• Convert grams to moles

• Determine the limiting reactant

In a mole-to-mole conversion, if you start with 0.134 moles of ethylene, how many moles of CO2 are produced?

• 0.536 moles

• 0.067 moles

• 0.268 moles

• 0.134 moles

What is the molar mass of lithium hydroxide used in the conversion to moles?

• 40.00 g/mol

• 23.95 g/mol

• 74.55 g/mol

• 122.55 g/mol

How many moles of lithium bromide are produced from 10 grams of lithium hydroxide?

• 0.418 moles

• 0.500 moles

• 0.134 moles

• 0.250 moles

What is the balanced equation coefficient for potassium chlorate in the mass-to-mass conversion?

• 2

• 1

• 3

• 4

What is the molar mass of potassium chlorate used in the conversion?

• 74.55 g/mol

• 342.14 g/mol

• 122.55 g/mol

• 142.04 g/mol

How many grams of aluminum sulfate are produced from 22.7 grams of sodium hydroxide?

• 40.3 grams

• 22.7 grams

• 14.8 grams

• 32.4 grams

What is the molar mass of aluminum sulfate used in the calculation?

• 78.01 g/mol

• 122.55 g/mol

• 142.04 g/mol

• 342.14 g/mol

How many grams of aluminum hydroxide are produced from 22.7 grams of sodium hydroxide?

• 14.8 grams

• 32.4 grams

• 22.7 grams

• 40.3 grams

What is the molar mass of sodium sulfate used in the calculation?

• 74.55 g/mol

• 142.04 g/mol

• 342.14 g/mol

• 122.55 g/mol