Stoichiometry and Limiting Reactants

The video tutorial covers stoichiometry, focusing on calculating moles, mass, and identifying limiting reactants in various chemical reactions. It includes problems involving H2O, chlorine, methane, HCl, NaOH, C5H12, sodium, water, lead, and nitrogen. The tutorial emphasizes understanding chemical equations, using molar mass, and applying stoichiometric ratios to solve problems.

What is the first step in solving a stoichiometry problem involving gases at STP?

• Convert moles to liters

• Convert moles to grams

• Convert liters to moles

• Convert grams to moles

How many grams of carbon are needed to react with 39.6 liters of water at STP?

• 30.0 g

• 24.5 g

• 21.2 g

• 18.0 g

What is the volume of 7500 cm³ of chlorine gas in liters?

• 7.5 L

• 750 L

• 0.75 L

• 75 L

How many moles of CH4 are produced from 7500 cm³ of Cl2 at STP?

• 1.500 moles

• 0.837 moles

• 0.500 moles

• 1.000 moles

What is the mass of HCl produced from 0.25 moles in a reaction?

• 18.2 g

• 15.0 g

• 12.5 g

• 9.13 g

Which reactant is the limiting reactant when 40 g of NaOH reacts with 36.5 g of HCl?

• NaOH

• HCl

• Both are limiting

• Neither is limiting

How many liters of carbon dioxide are produced from 531 g of C5H12 at STP?

• 825 L

• 990 L

• 600 L

• 750 L

In a reaction between 10 g of Na and 10 g of H2O, which is the limiting reactant?

• Neither is limiting

• Both are limiting

• Na

• H2O

What is the limiting reactant when 50 g of Pb reacts with 50 g of N2?

• Pb

• Neither is limiting

• Both are limiting

• N2

How many grams of nitrogen are left over after the reaction of 50 g of Pb with 50 g of N2?

• 45.5 g

• 0 g

• 50 g

• 54.5 g