Empirical Formula Chemistry

Which is the correct formula for: 3 Hydrogen (H) 1 Sulfur (S) 4 Oxygen (O)

• H₃SO₄

• HSO₄

• H₄S₃O

• H₂O

Tags

NGSS.MS-PS1-1

Zoe, Abigail, and James are studying chemistry together. They come across a compound with the formula Si₂F₆. They start debating about the empirical formula of this compound. Can you help them?

• SiF

• Si₂F₆

• SiF₃

• Si₆F₂

Tags

NGSS.MS-PS1-1

Henry, Samuel, and Maya were studying chemistry together. They came across a compound C₂F₆ and started discussing its empirical formula. Can you help them choose the correct empirical formula?

• CF

• C₂F₆

• C₆F₂

• CF₃

Tags

NGSS.MS-PS1-1

Grace, Nora, and Avery are studying chemistry. They come across the molecule CO₂ and wonder how many "C" are in it. Can you help them?

• 2

• 1

• 0

• 3

Tags

NGSS.MS-PS1-1

Which of the following is a correct example of an empirical formula?

Tags

DOK Level 1: Recall

Calculate the empirical formula for a compound with 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass.

• C3H6O

• CH3O2

• CH2O

• C2H4O2

What is the relationship between the empirical formula and the molecular formula?

• The empirical formula and molecular formula are identical.

• The empirical formula is always larger than the molecular formula.

• The empirical formula is a simplified ratio, while the molecular formula shows the actual number of atoms.

• The molecular formula is a simplified ratio, while the empirical formula shows the actual number of atoms.