Flashcardizz Empirical/Molecular Formulas and Stoichiometry

Front

What is an empirical formula?

Back

An empirical formula represents the simplest whole-number ratio of the elements in a compound.

Front

What is a molecular formula?

Back

A molecular formula shows the actual number of atoms of each element in a molecule of a compound.

Front

How do you determine the empirical formula from percent composition?

Back

Convert the percentages to grams, then to moles, and find the simplest mole ratio.

Front

What is stoichiometry?

Back

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

Front

What is the first step in stoichiometry?

Back

The first step is to determine a balanced chemical equation.

Front

How do you convert grams to moles?

Back

Use the formula: moles = mass (g) / molar mass (g/mol).

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 equation.

Front

What is the balanced equation for the reaction of nitrogen and fluorine to form NF3?

Back

N2 + 3F2 → 2NF3.

Front

How many grams of O2 are produced from 12.00 moles of NaClO3?

Back

576 g of O2.

Front

Which pair has the same empirical formula: NaCrO4 and Na2Cr2O7, or C2H4O2 and C6H12O6?

Back

C2H4O2 and C6H12O6.