Stoichiometry mole & mass

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

Define a mole in chemistry.

Back

A mole is a unit of measurement in chemistry that represents 6.022 x 10²³ particles (atoms, molecules, ions, etc.) of a substance.

Front

What is the mole ratio?

Back

The mole ratio is the ratio of the coefficients of any two substances in a balanced chemical equation, used to convert between moles of reactants and products.

Front

How do you calculate moles from mass?

Back

To calculate moles from mass, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of water (H₂O)?

Back

The molar mass of water (H₂O) is approximately 18 g/mol.

Front

Using the equation 2H₂ + O₂ → 2H₂O, how many moles of H₂ are needed for 1 mole of O₂?

Back

2 moles of H₂ are needed for 1 mole of O₂.

Front

What is the mole to mole ratio of H₂O to H₃PO₄ in the equation P₄O₁₀ + 6 H₂O → 4 H₃PO₄?

Back

The mole ratio of H₂O to H₃PO₄ is 6:4.

Front

How many moles of Fe can be produced from 3 moles of H₂ in the reaction Fe₂O₃ + 3H₂ → 2Fe + 3H₂O?

Back

2 moles of Fe can be produced from 3 moles of H₂.

Front

What is the balanced equation for the combustion of propane (C₃H₈)?

Back

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.

Front

How many grams of aluminum sulfate (Al₂(SO₄)₃) are produced from 250g of H₂SO₄ in the reaction 2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂?

Back

290 grams of aluminum sulfate are produced.