ATS Chemistry: Empirical formulae

What is the empirical formula of a substance with the molecular formula C₂H₄?

• C₂H₂

• C₂H₂

• C₁H₁

• CH₂

Tags

NGSS.MS-PS1-1

What is the empirical formula of a substance with the molecular formula NaCl?

• Na₂Cl

• NaCl₂

• NaCl

• Na₂Cl₂

What is the empirical formula of a substance with the molecular formula X₂₀Y₁₅?

• X₁₀Y₁₅

• X₅Y₃

• X₄Y₃

• X₂₀Y₁₅

Tags

NGSS.MS-PS1-1

What is the empirical formula of a substance with the molecular formula Se₈F₁₂?

• Se₈F₁₂

• Se₂F₃

• Se₄F₃

• SeF

What is the molecular formula of this substance?

• C₂H₂

• C₂H₂

• C₂H₆

• CH₂

Tags

NGSS.HS-PS1-3

What is the empirical formula of this substance?

• SO

• SO₂

• S₂O2

• SiO₂

What is the Mr of the compound Na₂SO₄?

• 142

• 140

• 71

• 172

What is the Mr of CO₂?

• 16

• 12

• 32

• 44

What is the Mr of SiO₂?

• 16

• 28

• 60

• 44

What is the empirical formula for hydrogen peroxide (H₂O₂)?

• H₂O

• H₂O₂

• HO

• HO₂