Stoichiometry Practice Flashcard

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 limiting reactant?

Back

A limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

Front

What is an empirical formula?

Back

An empirical formula is the simplest whole-number ratio of atoms of each element in a compound.

Front

Given the reaction: Cl₂ + 2KBr → Br₂ + 2KCl, how do you determine the amount of product formed?

Back

Use stoichiometric calculations based on the balanced equation and the amount of the limiting reactant.

Front

What is the mole ratio in the reaction 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe?

Back

The mole ratio of MgO to Fe is 3:2.

Front

How do you calculate the number of moles from grams?

Back

Use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the balanced equation for the combustion of hydrogen?

Back

2H₂ + O₂ → 2H₂O.

Front

If 8 moles of H₂ are used in the reaction 2H₂ + O₂ → 2H₂O, how many moles of water are produced?

Back

8 moles of water are produced.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures 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

What is the molar mass of water (H₂O)?

Back

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