C110 Chemistry Semester 2 Review

Front

What is the first thing you must do to solve a stoichiometry problem?

Back

Write a Balanced Equation

Front

KNO₃ --> KNO₂ + O₂
What coefficients are needed to balance the reaction?

Back

2, 2, 1

Front

The equation for Percent Yield: Options: (predicted/experimental) X 100, (experimental/predicted) X 100, (experimental - predicted)/ Predicted X 100

Back

(experimental/predicted) X 100

Front

True or False. You must convert grams to moles to do stoichiometry.

Back

True

Front

2H₂ + O₂ → 2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

Back

8 moles

Front

2H₂  +   O₂  →  2H₂O
How many moles of oxygen are consumed if 8 moles H₂ are used?

Back

4 moles of O₂

Front

What is a Limiting Reagent?

Back

what you run out of first

Front

What is a Excess Reagent?

Back

what you have left over

Front

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

Back

peanut butter

Front

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?

Back

3mol Mg / 2 mol Fe