Stoichiometry

Front

What is Stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance, defined as containing exactly 6.022 x 10²³ particles (atoms, molecules, ions, etc.).

Front

How do you calculate moles from grams?

Back

Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the balanced equation for the reaction of aluminum and chlorine?

Back

2Al(s) + 3Cl₂(g) → 2AlCl₃(s).

Front

In the reaction 2Al + 3Cl₂ → 2AlCl₃, how many moles of Cl₂ are needed for 5 moles of Al?

Back

7.5 moles of Cl₂ are needed.

Front

What is the molar mass of O₂?

Back

The molar mass of O₂ is 32 g/mol.

Front

How many grams of O₂ are produced from 12 moles of NaClO₃?

Back

576 grams of O₂ are produced.

Front

What is the balanced equation for the combustion of hydrogen?

Back

2H₂(g) + O₂(g) → 2H₂O(l).

Front

How many grams of H₂O are produced from 4 grams of H₂?

Back

36 grams of H₂O are produced.

Front

What is the molar mass of H₂O?

Back

The molar mass of H₂O is 18 g/mol.