Double Step Mole Conversions

Front

What is the mole ratio between N₂ and NH₃ in the reaction N₂ + 3H₂ → 2NH₃?

Back

1 mole N₂ to 2 moles NH₃.

Front

To convert from substance A to substance B, you must always go through ___________ ___________.

Back

mole ratio.

Front

What does "excess air" mean in a chemical reaction context?

Back

That there is more than enough air, we don't even have to consider it.

Front

How many moles of oxygen (O₂) are produced by the decomposition of 6.0 moles of potassium chlorate, KClO₃?

Back

9 moles O₂.

Front

What is the mole ratio of Ba(OH)₂ to AlPO₄ in the reaction 2AlPO₄ + 3Ba(OH)₂ → 2Al(OH)₃ + Ba₃(PO₄)₂?

Back

3 mol Ba(OH)₂ / 2 mol AlPO₄.

Front

Define mole ratio.

Back

The ratio of moles of one substance to moles of another substance in a balanced chemical equation.

Front

What is Avogadro's Number?

Back

6.022 x 10²³, the number of particles in one mole of a substance.

Front

What is molar mass?

Back

The mass of one mole of a substance, usually expressed in grams per mole (g/mol).

Front

What is the significance of balancing a chemical equation?

Back

To ensure that the law of conservation of mass is obeyed, meaning the number of atoms of each element is the same on both sides of the equation.

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).