Mass to Mass Stoichiometry Practice

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 the mole concept?

Back

The mole is a unit of measurement in chemistry that represents 6.022 x 10²³ particles (atoms, molecules, etc.). It allows chemists to count quantities of substances.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol). Formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the balanced equation for the reaction of sodium with water?

Back

2Na + 2H₂O → 2NaOH + H₂

Front

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

Back

The limiting reactant is the substance that is completely consumed first in a chemical reaction, limiting the amount of product formed. It can be determined by comparing the mole ratio of reactants used in the reaction.

Front

What is the molar mass of O₂?

Back

The molar mass of O₂ (oxygen gas) is approximately 32 g/mol.

Front

How many grams of hydrogen are produced from 120 g of sodium in the reaction 2Na + 2H₂O → 2NaOH + H₂?

Back

5.2 g of hydrogen are produced.

Front

What mass of O₂ is needed to burn 36.1 g of B₂H₆?

Back

124 g of O₂ is needed.

Front

How much aluminum is needed to react with 45 grams of O₂ in the reaction 4 Al + 3 O₂ → 2 Al₂O₃?

Back

1.875 moles of aluminum are needed.

Front

What is the molar mass of Al₂(SO₄)₃?

Back

The molar mass of aluminum sulfate, Al₂(SO₄)₃, is approximately 342 g/mol.