Flashcardizz Empirical/Molecular Formulas and Stoichiometry

Front

What are mole ratios used for in stoichiometry?

Back

Mole ratios are used for conversions in stoichiometry and are derived from the coefficients of the balanced chemical equation.

Front

How do you determine the mole ratio of water produced from oxygen in the reaction C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?

Back

The mole ratio of water produced from oxygen is 4 mol H₂O / 5 mol O₂.

Front

In the reaction 4Al + 3O₂ → 2Al₂O₃, how many moles of aluminum oxide are produced from 6 moles of oxygen?

Back

4 moles of aluminum oxide (Al₂O₃) are produced from 6 moles of oxygen.

Front

What is the empirical formula of a compound consisting of 72.2% magnesium (Mg) and 27.8% nitrogen (N) by mass?

Back

The empirical formula is Mg₃N₂.

Front

How many grams of CO₂ are produced when 4 moles of O₂ react with excess CH₄ in the reaction CH₄ + 2O₂ → CO₂ + 2H₂O?

Back

88.02 grams of CO₂ are produced.

Front

What is the definition of a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.

Front

What is the significance of coefficients in a balanced chemical equation?

Back

Coefficients indicate the number of moles of each substance involved in the reaction and are used to determine mole ratios.

Front

Define empirical formula.

Back

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

Front

What is stoichiometry?

Back

Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced equation.

Front

How do you calculate the molar mass of a compound?

Back

The molar mass is calculated by summing the atomic masses of all the atoms in the compound's formula.