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

Define Limiting Reactant.

Back

The 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 the formula for calculating percent yield?

Back

Percent Yield = (Actual Yield / Theoretical Yield) x 100%.

Front

How do you determine the theoretical yield of a reaction?

Back

The theoretical yield is calculated based on the balanced chemical equation and the amount of limiting reactant.

Front

What is the mole ratio in a balanced equation?

Back

The mole ratio is the ratio of moles of one substance to moles of another substance in a balanced chemical equation.

Front

Given the reaction 2 KClO3 → 2 KCl + 3 O2, how many moles of O2 are produced from 2 moles of KClO3?

Back

3 moles of O2 are produced.

Front

What is the significance of a balanced chemical equation?

Back

A balanced chemical equation ensures that the number of atoms for each element is conserved in a reaction.

Front

How do you convert grams to moles?

Back

To convert grams to moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of FeS?

Back

The molar mass of FeS (Iron(II) sulfide) is approximately 87.91 g/mol.

Front

If 5.00 moles of iron react with excess oxygen, how do you calculate the mass of iron (III) oxide produced?

Back

Use the balanced equation to find the mole ratio, then convert moles of iron (III) oxide to grams using its molar mass.