Mole-Mole Stoichiometry

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance. It is defined as 6.022 x 10^23 particles (atoms, molecules, ions, etc.) of that substance.

Front

What is stoichiometry?

Back

Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced chemical equation.

Front

What does a mole ratio represent?

Back

A mole ratio is a ratio between the amounts in moles of any two compounds involved in a chemical reaction.

Front

How do you determine the mole ratio from a balanced equation?

Back

The mole ratio can be determined by looking at the coefficients in front of the compounds in a balanced chemical equation.

Front

In the reaction 2AgNO3 + Cu -> Cu(NO3)2 + 2Ag, what is the mole ratio of AgNO3 to Cu(NO3)2?

Back

The mole ratio of AgNO3 to Cu(NO3)2 is 2:1.

Front

In the reaction N2 + 3H2 -> 2NH3, how many moles of N2 are needed for 6 moles of H2?

Back

2 moles of N2 are needed for 6 moles of H2.

Front

In the reaction S8 + 12 O2 -> 8 SO3, how many moles of S8 are needed for 3 moles of O2?

Back

0.25 moles of S8 are needed for 3 moles of O2.

Front

In the reaction 2Na + S -> Na2S, how many moles of Na2S are produced from 8 moles of Na?

Back

4 moles of Na2S are produced from 8 moles of Na.

Front

What is the mole ratio of carbon dioxide to water in the reaction 2 C2H6 + 7 O2 -> 4 CO2 + 6 H2O?

Back

The mole ratio of carbon dioxide to water is 4:6 or 2:3.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.