Assessment-Empirical Formula

Which of the following is also known as the simplest formula?

• chemical formula

• empirical formula

• molecular formula

• structural formula

Which step is essential in calculating the empirical formula using percent composition data?

• Finding the molecular formula

• Balancing chemical equations

• Converting percentages to moles

• Determining the compound's color

What does the empirical formula of a compound represent?

• The total number of electrons

• The compound's atomic mass

• The number of atoms in a molecule

• The simplest whole-number ratio of elements

Why is it important to determine the empirical formula of a compound?

• To predict its odor

• To calculate its pH

• To determine its boiling point

• To analyze its composition efficiently

What step is typically involved in calculating the empirical formula after converting percentages to moles?

• Identifying isotopes

• Determining molecular weight

• Balancing chemical equations

• Dividing moles by the smallest mole value

Which of the following best describes the concept of the empirical formula?

• It identifies the compound's isotopes.

• It reveals the compound's structural formula.

• It indicates the compound's molecular weight.

• It represents the elemental composition of a compound in the simplest whole-number ratio.

How can an understanding of empirical formulas be applied in chemistry and chemical engineering?

• To compose music

• To predict sports performance

• To design fashionable clothing

• To determine the most efficient chemical reactions

Which of the following best represents the importance of understanding empirical formulas?

• It allows for composing hit songs.

• It improves athletic performance.

• It helps choose the right fashion accessories.

• It simplifies the analysis of a compound's composition, aiding research in various fields.

What is the empirical formula of a compound whose percentage composition is 50.05% S and 49.95% O?

• SO

• S₂O 

• SO₂

• S₂O₂

A compound is found to consist of 43.64% P and 56.36% O. The molar mass for the compound is 283.88 g/mol. What is the empirical formula of the compound?

• P₂O₅

• P₂O

• PO₅

• P₅O₂