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.

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What is a mole in chemistry?

Back

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

Front

What does the law of conservation of mass state?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

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How do you calculate moles from grams?

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To calculate moles from grams, 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 18.02 g/mol.

Front

In the reaction N₂ + 3H₂ → 2NH₃, how many moles of NH₃ are produced from 1 mole of N₂?

Back

2 moles of NH₃ are produced from 1 mole of N₂.

Front

What is the stoichiometric coefficient in a balanced equation?

Back

The stoichiometric coefficient is the number placed before a reactant or product in a balanced chemical equation, indicating the ratio of moles involved in the reaction.

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How do you determine the limiting reactant in a chemical reaction?

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The limiting reactant is determined by calculating the amount of product each reactant can produce; the reactant that produces the least amount of product is the limiting reactant.

Front

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

Back

The balanced equation for the combustion of propane is: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.

Front

How many grams of aluminum sulfate (Al₂(SO₄)₃) can be produced from 250g of H₂SO₄?

Back

290 grams of aluminum sulfate can be produced from 250g of H₂SO₄.