Bellringer

The limiting reactant can be best described as:

• The reactant that you have extra at the end of reaction.
• The reactant that gets consumed all the way.
• The percent yield of a chemical equation.
• The theoretical yield of a chemical equation.

The excess reactant can be best described as:

• The reactant that you have extra at the end of reaction.
• The reactant that gets consumed all the way.
• The percent yield of a chemical equation.
• The theoretical yield of a chemical equation.

Identify which of the two reactants is the limiting reactant.

• HCl
• H2
• Cl2
• There's no way to tell

During an experiment Joe starts out with 14 grams of H2O. He calculates the theoretical yield of NaOH that will be produced is 4.6 grams. During the experiment, he actually produces 3.2 grams of NaOH. What is Joe’s percent yield for NaOH?

• 3.04%
• 22.9%
• 69.6%
• 143.75%

The combustion of methane (CH4) produces carbon dioxide and water. Assume that 3.0 mol of CH4 burned in the presence of excess air. What is the percentage yield if in an experiment the reaction produces 81.0 g of CO2? CH4 + 2 O2 --> CO2 + 2 H2O

• 132.027%
• 61.35%
• 162.99%
• 3.70%

How many moles of oxygen are needed to produce 10 moles of water according to the following equation? 4 NH3 + 5 O2 → 4 NO + 6 H2O

• 6 mol
• 3.2 mol
• 8.333 mol
• 10 mol

In photosynthesis, plants use energy from the sun to produce glucose and oxygen from the reaction of carbon dioxide and water. What is the theoretical yield of glucose produced when 3.00 moles of water reacts with carbon dioxide?(mass of glucose is 180.156g) 6 CO2 + 6 H2O → C6H12O6 + 6 O2

• 91.25 g
• 90.078 g
• 6 mol
• 4 mol