Mastering Gram-to-Gram Conversions in Chemical Reactions

Mr. Mott explains complex gram-to-gram calculations using equations. He covers three problems: converting grams of NaOH to moles of H2, determining moles of Al reacting with AgNO3, and calculating grams of FeOH3 from grams of water. Each problem demonstrates different types of stoichiometric calculations, including mole-to-mole, mole-to-gram, and gram-to-gram conversions. The video emphasizes the importance of using equations and molar masses to solve these problems efficiently.

What is the molar mass of NaOH used in the first problem?

• 80 g/mol

• 132.8 g/mol

• 40 g/mol

• 23 g/mol

How many moles of H2 are produced from 132.8 grams of NaOH?

• 1.66 moles

• 2.00 moles

• 0.83 moles

• 3.32 moles

In the second problem, what is the ratio of moles of Al to moles of AgNO3?

• 1:1

• 3:1

• 1:2

• 1:3

How many moles of Al react with 0.45 moles of AgNO3?

• 0.60 moles

• 0.45 moles

• 0.30 moles

• 0.15 moles

What is the molar mass of water used in the third problem?

• 18 g/mol

• 36 g/mol

• 54 g/mol

• 72 g/mol

How many grams of FeOH3 are needed to produce 88.2 grams of water?

• 349 grams

• 213.6 grams

• 106.8 grams

• 54 grams

What is the molar mass of FeOH3 calculated in the third problem?

• 106.8 g/mol

• 88.2 g/mol

• 213.6 g/mol

• 55.8 g/mol

Which type of problem involves converting moles to grams?

• Mole-to-mole

• Mole-to-gram

• None of the above

• Gram-to-gram

Which type of problem was the second example?

• None of the above

• Mole-to-gram

• Mole-to-mole

• Gram-to-gram

What method is emphasized for solving these types of problems?

• Trial and error

• Proportions

• Graphical analysis

• Dimensional analysis