Stoichiometry Basics

Front

What is a mole ratio?

Back

The ratio of a reactant/product to a different one - compared by the number of particles.

Front

Where are the numbers for a mole ratio found?

Back

They are found as coefficients in the reaction's balanced chemical equation.

Front

How many moles of ethane (C2H6) are required to produce 13.5 moles of water from the reaction 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O?

Back

4.5 mol C2H6

Front

What is the first step in solving how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C2H6) in the reaction 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O?

Back

Identify the mole ratio between ethane and oxygen from the balanced equation.

Front

What is the final answer for how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C2H6) in the reaction 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O?

Back

21 mol O2

Front

Define stoichiometry.

Back

The calculation of reactants and products in chemical reactions.

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What does the coefficient in a balanced chemical equation represent?

Back

The number of moles of a substance involved in the reaction.

Front

How do you determine the number of moles of a product formed in a reaction?

Back

Use the mole ratio from the balanced equation.

Front

What is the mole ratio of C2H6 to O2 in the reaction 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O?

Back

2:7