If a compound contains only carbon, hydrogen, and oxygen, and its combustion produces 44 grams of CO₂ and 18 grams of H₂O, what is the empirical formula of the compound?

• C2H6O

Which of the following best describes the difference between a molecular formula and an empirical formula?

• Molecular formula is always twice the empirical formula
• Empirical formula shows the actual number of atoms
• Molecular formula shows the simplest ratio
• Empirical formula shows the simplest ratio

A sample of a hydrocarbon is combusted and produces only CO₂ and H₂O. This means the compound contains only carbon and hydrogen.

A compound has an empirical formula of CH₂O and a molar mass of 180 g/mol. What is its molecular formula?

• C2H4O2
• C6H12O6
• CH₂O
• C3H6O3

True or False: The empirical formula of C₆H₁₂O₆ is CH₂O.

If 0.6 moles of carbon and 1.2 moles of hydrogen are present in a compound, what is the empirical formula?

• CH2

Which of the following is NOT an empirical formula?

• CH
• CH₂O
• C₂H₄
• NH₃

A compound with molecular formula C₄H₁₀ has the same empirical formula as C₂H₅.

Which piece of data is essential to determine the empirical formula of a compound from combustion analysis?

• Color of the compound
• Volume of air used
• Mass of CO₂ and H₂O produced
• Boiling point of the compound

A compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is the empirical formula?

• CH2O

The empirical formula of a compound can be determined if only the molar mass is known.

Which of the following steps comes first when determining the empirical formula from combustion data?

• Divide by the smallest number of moles
• Calculate moles of carbon and hydrogen
• Write the molecular formula
• Find the molar mass

A compound has an empirical formula of NO₂. If its molar mass is 92 g/mol, what is its molecular formula?

• N2O4

If a compound's empirical formula is C₂H₅ and its molar mass is 58 g/mol, what is its molecular formula?

• C₂H₅
• C₄H₁₀
• C₆H₁₅
• C₈H₂₀

True or False: The empirical formula is always the same as the molecular formula.

What is the empirical formula of a compound that contains 24 g of carbon, 4 g of hydrogen, and 32 g of oxygen?

• CH2O

Which of the following could be a molecular formula for a compound with the empirical formula CH?

• C₂H₂
• C₃H₃O
• CH₂
• C₄H₄O

A compound has an empirical formula of C₃H₈ and a molar mass of 88 g/mol. What is its molecular formula?

• C6H16

If a compound produces 22 grams of CO₂ and 9 grams of H₂O upon combustion, which element's mass can be calculated directly from the CO₂ produced?

• Hydrogen
• Oxygen
• Carbon
• Nitrogen

If a compound's empirical formula is C₃H₇ and its molar mass is 86 g/mol, what is its molecular formula?

• C6H14